Stabilizer pad for vehicles

ABSTRACT

A stabilizer pad including a pair of plate members supported from a stabilizer arm; and a pad assembly that is adapted for mounting between the pair of plate members. The pad assembly has a resilient pad having opposite ground engageable work surfaces and opposite support surfaces, and a plurality of support members extending from the opposite support surfaces of the resilient pad. The support members are each adapted for engagement with a receiving slot of one of the plate members for mounting of the pad assembly to the plate members. At least one retaining member extends through the resilient pad and between the plate members for holding the pad assembly to the plate members.

RELATED APPLICATIONS

This application claims priority to and is a continuation-in-part ofU.S. application Ser. No. 10/632,242 filed Aug. 4, 2003; now U.S. Pat.No. 7,040,659 which, in turn is a continuation-in-part of U.S.application Ser. No. 10/387,898 filed Mar. 13, 2003 now U.S Pat. No.7,073,821.

All of the foregoing applications along with U.S. application Ser. No.09/996,013 filed Nov. 28, 2001; U.S. application Ser. No. 09/920,148filed Aug. 1, 2001; U.S. application Ser. No. 09/807,712 filed Apr. 17,2001; U.S. application Ser. No. 09/183,473 filed Oct. 30, 1998; and U.S.Pat. Nos. 6,270,119; 6,422,603; and 6,634,672 are now herebyincorporated by reference herein in their entirety.

FIELD OF THE INVENTION

The present invention relates generally to stabilizer pads for vehicles,and more particularly to pivotally mounted stabilizer pads.

BACKGROUND OF THE INVENTION

FIG. 1 is a fragmentary view of a typical loader/backhoe 10 having ashovel mechanism 12, stabilizer arms 14 and 16, and associatedstabilizer pads 18 and 20, respectfully. Hydraulic pistons 15 are usedto operate each of the stabilizer arms 14 and 16 independently. In FIG.1, the stabilizer arms are in an operational, extended position with thestabilizer pads 18 and 20 in engagement with the ground surface toprevent movement of the backhoe during operation of the shovel mechanism12. When the backhoe 10 is to be moved, the pistons associated with eachcylinder are withdrawn so that the stabilizer arms 14 and 16 pivot andraise the stabilizer pads above ground level.

The stabilizer pad 18 of FIG. 1 is shown in greater detail in FIGS. 2and 3. Stabilizer pad 20 is substantially identical to stabilizer pad18. The stabilizer pad 18 and similar stabilizer pads are furtherdescribed in U.S. Pat. Nos. 4,889,362, 5,054,812, 5,466,004, 5,547,220and 5,667,245, each of which is issued to the inventor of the presentapplication and incorporated herein by reference in their entirety. Thestabilizer pad 18 includes a flat plate 22 having flanges 24 and 26,both extending from one surface of plate 22. The stabilizer pad 18 isalso provided with supporting webs or ribs 25, one associated with eachflange. The ribs 25 provide additional support for the flanges 24 and26. The plate 22 is notched at 30 between flanges 24 and 26 asillustrated in FIG. 1. The plate is notched to accommodate the arm 14and to enable reversible rotation of the stabilizer pad.

The stabilizer arm 14 includes a journal end for accommodating pin 34.Pin 34 also fits within holes of flanges 24 and 26. The pin is used tosecure the stabilizer pad to the arm using, for example, a cotter pin asillustrated in FIG. 3.

On the side of the flat plate 22 opposite that containing the flanges 24and 26 are disposed three laminated rubber pads 40. Each of the rubberpads 40 includes laminated rubber sections supported between angle irons44 and 48. The angle irons 44 and 48 have a base leg and an upright leg.Each of the upright legs has holes therein for receiving elongatedsecuring pins 50 for containing the laminated rubber sections betweenthe angle irons. The laminated pads 40 are secured to the plate 22 usingbolts 53 and nuts 55.

The stabilizer pads 18 and 20 are rotatable about pin 34 when thestabilizer arms are in the raised position to place either the rubberpads 40 downward for engagement with the ground or to place the flanges24 and 26 downward for engagement with the ground.

In a typical operation, the rubber pad side of the stabilizer pad 18 ispositioned to engage the ground, as shown in FIG. 1, when the groundsurface is a relatively flat hard surface such as concrete or pavement.The flange side of the stabilizer pad 18, as shown in FIG. 2, ispositioned to engage the ground when the ground surface is an unfinishedground surface, such as gravel or dirt. The flanges are designed to diginto the unfinished ground surface to anchor and stabilize the backhoe.

Although the prior art, reversible stabilizer pads described aboveprovide reliable operation, it is desirable to provide a simplifiedstabilizer pad with improved operational performance over the stabilizerpad described above.

SUMMARY OF THE INVENTION

In accordance with the present invention there is provided a stabilizerpad apparatus that comprises a pair of plate members supported from astabilizer arm; and a pad assembly that is adapted for mounting betweenthe pair of plate members. The pad assembly includes a resilient padhaving opposite ground engageable work surfaces and opposite supportsurfaces, and a plurality of support members extending from the oppositesupport surfaces of the resilient pad. The support members are eachadapted for engagement with a receiving slot of one of the plate membersfor mounting of the pad assembly to the plate members. At least oneretaining member extends through the resilient pad and between the platemembers for holding the pad assembly to the plate members. The retainingmember is removable to permit the resilient pad to be moved betweenopposite work surfaces and to be re-engagable so as to permit selectivepositioning of either of the opposite work surfaces for use as a surfacefor ground engagement.

In accordance with aspects of the invention, the resilient pad may beformed as a molded rubber pad having at least one hole for receiving theat least one retaining member. Alternatively the resilient pad maycomprise a plurality of laminated rubber layers. The opposite groundengageable work surfaces may be disposed transverse to the oppositesupport surfaces. The support members may be disposed in separate setsat each side of the resilient pad and extend outwardly from the oppositesupport surfaces. The support members may be comprised of elongatedsupport rods, separate lugs, or posts. Each plate member may have aplurality of spaced slots that can be either straight or tapered.

In accordance with another aspect of the present invention, a resilientpad structure is mounted from a support weldment and comprises, aunitary resilient pad having opposite ground engaging surfaces, one ofwhich is adapted to be in a downwardly facing orientation for groundengagement; a plurality of support posts extending from the resilientpad at spaced intervals and each adapted for engagement with anaccommodating slot of the weldment; and at least one securing memberthat is connectable between the resilient pad and the weldment forholding the resilient pad to the weldment. The support posts preferablyextend from opposite sides of the resilient pad, and may be spaced alongopposite support sides of the resilient pad and along a linear locus.

In accordance with other aspects of the invention, the resilient pad mayhave a plurality of passages therethrough, each for receiving anelongated support member, the opposite free ends of which form thesupport posts. For some applications an adaptor plate is disposedbetween the resilient pad and weldment. The pad may be constructed sothat the support posts are disposed so that there is a greater wearsurface on one side of the pad than the other side. In another versionthe resilient pad may be formed of pad sections of different hardness.In still another version the pad may be reversible between differenttypes of surfaces including a weldment that has grouser points.

In accordance with still a further embodiment of the invention there isprovided a resilient stabilizer pad comprising, a resilient pad memberhaving opposite ground engaging surfaces, one of which is adapted to bein a downwardly facing orientation for ground engagement, and havingopposite support surfaces; and a plurality of mounting lugs includingone lug set extending from one support surface side of the resilient padmember for releasable engagement with a corresponding slot set of onesupport plate of a weldment, and another lug set extending from anopposite support surface side of the resilient pad member for releasableengagement with a corresponding slot set of another support plate of aweldment. The resilient pad may have a plurality of passagestherethrough, each for receiving an elongated support member, theopposite free ends of which form the support lugs. The support lugs maybe spaced along opposite support sides of the resilient pad and along alinear locus.

BRIEF DESCRIPTION OF THE DRAWINGS

For a better understanding of the present invention, reference is madeto the drawings which are incorporated herein by reference and in which:

FIG. 1 is a fragmentary view of a typical loader/backhoe having astabilizer arm with stabilizer pads of the prior art secured thereto;

FIG. 2 is a perspective view of the stabilizer pad and arm of FIG. 1 ina gravel or dirt engaging position;

FIG. 3 is a side elevational view of the stabilizer pad and armconstruction in the position of FIG. 2;

FIG. 4 is a perspective view of a first embodiment of a stabilizer padof the present invention in a position for engaging a smooth surface;

FIG. 5 is a perspective view of the embodiment of FIG. 4 with thestabilizer pad in a position for engaging a gravel or dirt groundsurface;

FIG. 6 is a side view of the stabilizer pad of FIG. 4 with thestabilizer pad in the position for engaging a smooth surface;

FIG. 7 is a side view of the stabilizer pad of FIG. 4 with thestabilizer pad in the position for engaging a gravel or dirt groundsurface;

FIG. 8 is a top view of the stabilizer pad of FIG. 4 with the stabilizerpad in the position for engaging a smooth surface;

FIG. 9 is a front view of the stabilizer pad of FIG. 4 with thestabilizer pad in the position for engaging a smooth surface;

FIG. 10 is an exploded perspective view of the stabilizer pad of FIG. 4in the position for engaging a smooth surface;

FIG. 11 is a perspective view of a second embodiment of a stabilizer padwith the stabilizer pad in the position for engaging a smooth surface;

FIG. 12 is a side view of the stabilizer pad of FIG. 11;

FIG. 13 is a cross-sectional side view taken along line 13-13 of FIG. 11with the stabilizer pad in the position for engaging a dirt or gravelsurface;

FIG. 14 is a perspective view of a third embodiment of a stabilizer padwith the stabilizer pad in the position for engaging a smooth surface;

FIG. 15 is a front view of the stabilizer pad of FIG. 14 as taken alongline 15-15 of FIG. 14;

FIG. 16 is an exploded perspective view of the stabilizer pad of FIG.14;

FIG. 17 is a perspective view of a fourth embodiment of a stabilizer padwith the stabilizer pad in the position for engaging a smooth surface;

FIG. 18 is an exploded perspective view of the stabilizer pad shown inFIG. 17;

FIG. 19 is a perspective view of a fifth embodiment of a stabilizer padwith the stabilizer pad in the position for engaging a smooth surface;

FIG. 20 is an exploded perspective view of the stabilizer pad of FIG.19;

FIG. 21 is a perspective view of a sixth embodiment of a stabilizer padwith the stabilizer pad in the position for engaging a smooth surface;

FIG. 22 is an exploded perspective view of the stabilizer pad of FIG.21; and

FIG. 23 is an exploded perspective view of a sixth embodiment of astabilizer pad with the stabilizer pad in the position for engaging asmooth surface.

FIG. 24 is a perspective view of a further embodiment of the presentinvention with the stabilizer pad in a position for engaging a smoothsurface;

FIG. 25 is an exploded view of the stabilizer pad of FIG. 24;

FIG. 26 is a perspective view of still another embodiment of the presentinvention employing a reversible resilient pad;

FIG. 27 is an exploded view of the stabilizer pad of FIG. 26;

FIG. 28 is an illustration of a backhoe embodying an offset padconstruction;

FIG. 29 is a perspective view of the offset pad construction alsoemploying a releasable latch;

FIG. 30 is a plan view of the embodiment of FIG. 29;

FIG. 31 is a side view of the embodiment of FIG. 29 with the latch in alocked position;

FIG. 32 is a side view with the latch in a released position;

FIG. 33 is a side view of the stabilizer pad with the pad rotatedthrough 180°;

FIG. 34 is a perspective view of a further embodiment of a padconstruction;

FIG. 35 is a side elevational view of the pad construction of FIG. 34;

FIG. 36 is a front elevational view of the pad construction of FIG. 34,partially broken away to show the pad construction;

FIG. 37 is an alternate cross-sectional detail showing a swagingtechnique;

FIG. 38 is a side elevational view of another embodiment;

FIG. 39 is a front elevational view of the embodiment of FIG. 38;

FIG. 40 is a cross-sectional plan view taken along line 40-40 of FIG.39;

FIG. 41 is a cross-sectional side view taken along line 41-41 of FIG.39;

FIG. 42 is a side elevational view of another embodiment using atriangular-shaped pad;

FIG. 43 is a front elevational view of the embodiment of FIG. 42;

FIG. 44 is a perspective view of still another embodiment of the presentinvention;

FIG. 45 is a side view of the embodiment of FIG. 44 an the clawposition;

FIG. 46 is a front elevational view of the embodiment of FIG. 44 astaken along line 46-46 of FIG. 44;

FIG. 47 is a fragmentary exploded perspective view of the locking pin;

FIG. 48 is a perspective view of still another embodiment of the presentinvention;

FIG. 49 is a side view of the embodiment of FIG. 48 an the clawposition;

FIG. 50 is an exploded perspective view of the embodiment of FIGS. 48and 49;

FIG. 51 is a cross-sectional view taken along line 51-51 of FIG. 48;

FIG. 52 is a fragmentary cross-sectional view of an alternate padconstruction;

FIGS. 53A and 53B show cross-sectional views of pad constructions usinga forced pin;

FIG. 54 is a perspective view of still a further embodiment of thepresent invention;

FIG. 54A is a perspective view of yet another embodiment of the presentinvention;

FIG. 54B is a cross-sectional view of the embodiment of FIG. 54A astaken along line 54B-54B of FIG. 54A;

FIG. 54C is a cross-sectional view taken along line 55C-54C of FIG. 54B;

FIG. 54D is an exploded perspective view of the embodiment of FIG. 54A;

FIG. 55 is a perspective view of still a further embodiment of thepresent invention using a latch construction;

FIG. 56 is a cross-sectional view of the embodiment of FIG. 55 as takenalong line 56-56 of FIG. 55;

FIG. 57 is a cross-sectional view taken along line 57-57 of FIG. 56;

FIG. 57A is a perspective view of still another embodiment of thepresent invention using a latch construction similar to that describedin FIG. 55;

FIG. 57B is a cross-sectional view of the embodiment of FIG. 57A astaken along line 57B-57B of FIG. 57A;

FIG. 57C is a cross-sectional view taken along line 57C-57C of FIG. 57A;

FIG. 58 is a perspective view of a further embodiment of the invention;

FIG. 59 is a cross-sectional view through the pad of FIG. 58 as takenalong line 59-59 of FIG. 58;

FIG. 60 is an exploded perspective view of the embodiment shown in FIGS.58 and 59;

FIG. 61 is a perspective view of an alternate embodiment of a padassembly or pad pack with side plates;

FIG. 62 is a fragmentary cross-sectional view similar to the embodimentof FIG. 59 but showing the alternate construction of FIG. 61;

FIG. 63 is a cross-sectional view similar to that shown in FIG. 59 butshowing an alternate embodiment in which the support pins are capturedin grooves in the weldment;

FIG. 64 is still another alternate embodiment in a perspective view andin which the pad pins engage in a horizontal slot;

FIG. 65 is a fragmentary cross-sectional view taken along line 65-65 ofFIG. 64;

FIG. 66 is also a fragmentary cross-sectional view like that shown inFIG. 65 but illustrating an alternate version in which the support pinshave a stepped end to hold them in place;

FIG. 66A is a fragmentary cross-sectional view like that shown in FIG.66 but illustrating a stepped pin, as well as a stepped shoulder in thesupport flange;

FIG. 67 is yet another perspective view of an alternate embodiment ofthe pad in which side plates are added to the sides of the weldment;

FIG. 68 is a fragmentary cross-sectional view taken along line 68-68 ofFIG. 67;

FIG. 69 is a fragmentary cross-sectional view taken along line 69-69 ofFIG. 67;

FIG. 70 is a fragmentary cross-sectional view similar to thatillustrated in FIG. 69 showing the worn laminate pad before reversingthe position thereof;

FIG. 71 is an exploded cross-sectional view with a first step inreversing the pad;

FIG. 72 is a cross-sectional view similar to that shown in FIG. 70 andillustrating the pad being reversed and clamped in place;

FIG. 73 is a perspective view of a further embodiment of the invention;

FIG. 74 is a cross-sectional view of the embodiment of FIG. 73 as takenalong line 74-74 of FIG. 73;

FIG. 75 is an exploded perspective view similar to the embodiment ofFIG. 73 with a single piece molded pad;

FIG. 76 is a perspective view of a further embodiment in which theresilient pad is supported directly by the support plate;

FIG. 77 is a cross-sectional view of the embodiment of FIG. 76 and astaken along line 77-77 of FIG. 76;

FIG. 78 is an exploded perspective view of still a further embodiment ofthe invention with a molded pad having different hardnesses of rubber;

FIG. 79 is a perspective view of another embodiment of the inventionemploying an adaptor plate;

FIG. 80 is an exploded perspective view of the embodiment of FIG. 79;

FIG. 81 is a perspective view of an alternate pad construction;

FIG. 82 is a perspective view of still another alternative construction;

FIG. 83 is a perspective view of still a further alternativeconstruction;

FIG. 84 is a perspective view of another embodiment of the invention;

FIG. 85 is a perspective view of the pad itself of FIG. 84;

FIG. 86 shows a reversible pad construction with an improved grouserconstruction;

FIG. 87 is a fragmentary view of an alternate grouser arrangement; and

FIG. 88 is a fragmentary view of still another alternate grouserarrangement.

DETAILED DESCRIPTION

This invention is not limited in its application to the details ofconstruction and the arrangement of components set forth in thefollowing description or illustrated in the drawings. The invention iscapable of other embodiments and of being practiced or of being carriedout in various ways. Also, the phraseology and terminology used hereinis for the purpose of description and should not be regarded aslimiting. The use of “including,” “comprising,” or “having,”“containing”, “involving”, and variations thereof herein, is meant toencompass the items listed thereafter and equivalents thereof as well asadditional items.

One embodiment of a stabilizer pad 118 in accordance with the presentinvention will now be described with reference to FIGS. 4-10. Asunderstood by those skilled in the art, stabilizer pads in accordancewith embodiments of the present invention may be used with a backhoe asshown in FIG. 1, and may also be used with other vehicles or platformshaving stabilizing members for stabilizing the vehicle or platform.

The stabilizer pad 118 has a substantially U-shaped frame formed in oneembodiment from a continuous steel sheet. The continuous steel sheet isbent to form the U-shape consisting of a base plate 122 and flanges 124and 126. Each of the flanges 124 and 126 has outer grouser points 130and inner grouser points 131.

Mounted to the underside of the base plate 122 is a resilient pad 140.The resilient pad 140 is secured to the fire using brackets 142 a and142 b which respectfully couple to flanges 124 and 126. The brackets aremounted to the flanges using bolts 144, nuts 146 and washers 148, asbest shown in FIG. 10.

The resilient pad 140 is formed using a plurality of rubber strips 150that are compressed using brackets 142 a and 142 b and steel rods 152.In the embodiment shown, the steel rods 152 are welded to each of thebrackets 142 a and 142 b, however, in other embodiments, the steel rodscan be replaced by bolts and nuts. In one embodiment of the presentinvention, the rubber strips are made from sidewall segments of trucktire carcasses or from rubber conveyor belts, both of which have beenfound to provide desirable flexibility and surface friction for use instabilizer pads.

Each of the flanges 124 and 126 has a hole, respectfully 134 and 135 inalignment with bushings 136 and 137. The holes and bushings are designedto accommodate the pin 34 of the stabilizer arm 14 to couple thestabilizer arm to the stabilizer pad as in the prior art.

The stabilizer pad 118 includes an optional cam 156 mounted to bushing136. In addition, the stabilizer arm 14 includes a polyethylene wheel154 mounted to the side of the stabilizer arm as shown in FIG. 4, usinga bolt and a nut. In one embodiment, the cam is made from a steel rodand is welded to the bushing, however, in other embodiments, the cam maybe made from other relatively hard materials and fastened to the armusing other techniques. The polyethylene wheel and cam preventinadvertent flipping of the stabilizer pad as described further belowand as described in U.S. patent application Ser. No. 08/909,524, whichis incorporated herein by reference. Other mechanisms for preventingself-flipping, such as those described in U.S. Pat. Nos. 5,054,812 and5,667,245, may also be used with stabilizer pads of the presentinvention.

Stabilizer pad 118 is rotatable about pin 34 when the stabilizer arm isin its upright position to place either the resilient pad 140 or thegrouser points 130 downward to engage the ground when the stabilizerarms are lowered to stabilize the vehicle. When the vehicle is operatedon a smooth, finished ground surface, it is desirable to place theresilient pad 140 of the stabilizer pad 118 in contact with the groundsurface. When the vehicle is operated on a rough or unfinished groundsurface, it is desirable to position the stabilizer pad such that theouter grouser points 130, and in some instances the inner grouser points131, contact the ground surface. FIGS. 4 and 6 show the stabilizer padwith the resilient pad 140 in position to engage the ground surface,while FIGS. 5 and 7 show the stabilizer pad with the outer grouserpoints 130 in position to engage the ground surface.

As shown in FIG. 7, the outer grouser points 130 are slightly longerthan the inner grouser points 131 allowing the outer grouser points tocontact the ground surface to provide maximum stability. On particularlyrough or uneven surfaces, the inner grouser points may also contact theground surface. In other embodiments of the present invention, thestabilizer pad 118 may not include the inner grouser points.

As briefly discussed above, the polyethylene wheel 154 and cam 156 areused to prevent the stabilizer pad 118 from inadvertently flipping whenthe stabilizer arm is raised. The weight of the resilient pad 140 maycause the stabilizer pad to flip from the position shown in FIG. 7 tothat shown in FIG. 6 by rotating in the direction of arrow 160 when thestabilizer arm is raised. When the stabilizer pad rotates in thedirection shown by arrow 160, the cam 156 contacts the wheel 154 andprevents further rotation of the stabilizer pad. When it is desired toflip the stabilizer pad from the position shown in FIG. 7 to that shownin FIG. 6, additional rotational force can be applied to the stabilizerpad by an operator of the vehicle to cause the polyethylene wheel 154 todeform slightly and allow the cam to pass by the polyethylene wheel.

To rotate the stabilizer pad from the position shown in FIG. 6 to thatshown in FIG. 7, the stabilizer pad is rotated approximately 135° aboutthe pin 34 in the direction shown by arrow 162 (see FIG. 6). Similarly,to move from the position shown in FIG. 7 to that shown in FIG. 6, thestabilizer pad 118 is rotated approximately 135° about pin 34 in thedirection shown by arrow 160.

A second embodiment of a stabilizer pad 218 in accordance with thepresent invention will now be described with reference to FIGS. 11-13,which show the stabilizer pad 218 mounted to a stabilizer arm 214.Stabilizer arm 214 differs from stabilizer arm 14 in that it includesonly one pin 234 for coupling to both a hydraulic piston 215 and to thestabilizer pad 218. In addition, the stabilizer arm 214 includes a steelplate 216 contained within the stabilizer arm to provide rigidity to thestabilizer arm. Stabilizer pad 218 is similar to stabilizer pad 118, andsimilar components are labeled using the same reference numbers.Stabilizer pad 218 differs from stabilizer pad 18 in that the bushings236 and 237 used to mount the stabilizer pad 218 to the stabilizer arm214 are sized to accommodate the pin 234.

A third embodiment of a stabilizer pad 318 for use on the stabilizer arm14 will now be described with reference to FIGS. 14-16. The thirdembodiment includes flange pieces 324 and 326 and a resilient pad 340.The flanges 324 and 326 are coupled together through the pin 34 of thestabilizer arm and are coupled to the resilient pad 340. The flangepieces have bushings 336 and 337 for receiving the pin 34. Each of theflange pieces has a pair of outer grouser points 330 and three innergrouser points 331. Each of the flange pieces also includes a pair ofright angle re-enforcing sections 332 and 334, which provide structuralre-enforcement for the pad and as described below provide additionalstabilization when the stabilizer pad is used on a rough or unfinishedsurface. The right angle sections 332 also function as mounting bracketsfor mounting the reversible resilient pad 340, and each of the rightangle sections 332 includes mounting holes 345 for this purpose.

The resilient pad 340, similar to the pad 140 of the first embodiment,is formed from a plurality of rubber strips 350. The rubber strips 350are compressed between brackets 342 a and 342 b using steel rods 352.Each of the rubber strips 350 and the brackets 342 a and 342 b has aslot 362 to receive a mounting plate 322. The mounting plate 322 hasmounting holes 360 that align with mounting holes 345 on the flanges tomount the mounting plate to the flanges using bolts 349, washers 346 andnuts 348. In one version of the third embodiment, the flanges 324 and326 and the mounting plate 322 are made from steel.

One significant advantage of the embodiment of the invention shown inFIGS. 14-16 is that the resilient pad 340 is reversible to extend thelife of the pad. The resilient pad 340 can be mounted such that eithersurface 368 contacts the ground (as shown in FIG. 15), or such thatsurface 366 of the pad contacts the ground. With the resilient pad 340removed from the flanges, the resilient pad can be rotated 180 degreesto change from surface 368 of the pad facing down to surface 366 of thepad facing down. The rubber strips used with stabilizer pads can wearover time, and the ability to change surfaces of the resilient pad 340significantly extends the usable life of the resilient pad.

Stabilizer pad 318 is rotatable about pin 34 in a manner similar tostabilizer pad 118 described above to allow either the resilient pad 340or the grouser points to contact the ground. As with stabilizer pad 118,the outer grouser points 330 are longer than the inner grouser points331.

In FIGS. 14 and 15, stabilizer pad 318 is shown mounted to thestabilizer arm 14 using pin 34. In other embodiments, the stabilizer pad318 may be mounted to stabilizer arm 214 using a common pin, such as pin234 in FIG. 11, with the hydraulic piston 215.

The right angle sections 332 and 334 provide additional stability forthe stabilizer pad 318 when the grouser points 330 contact the ground.Typical grouser points, such as those provided on flanges 24 and 26 ofprior art stabilizer pad 18 (FIG. 3), have angled surfaces extending inopposite directions along one axis from the tip of the grouser point.Grouser points 330 have angled surfaces 370 and 371 extending from thetip of the grouser points in opposite directions along an x axis (seeFIG. 14 for axis orientation), and in addition have angled surfaces 372extending in a direction along a y-axis orthogonal to the x-axis. Theright angle sections provide additional stability by resisting movementof the stabilizer pad in the y-axis direction. As understood by oneskilled in the art, in other embodiments, the right angle sections 332and 334 may form an angle other than ninety degrees with the flanges.

A fourth embodiment of a stabilizer pad 418 in accordance with thepresent invention will now be described with reference to FIGS. 17 and18. Stabilizer pad 418 is similar to stabilizer pad 318 and like partsare labeled using the same reference numbers. Stabilizer pad 418 differsfrom stabilizer pad 318 in that the resilient pad 440 of stabilizer pad418 has two separate slots 462 a and 462 b rather than one slot 362 asin resilient pad 340 of stabilizer pad 418. In addition, the mountingplate 322 of stabilizer pad 318 is replaced by two separate mountingplates 422 a and 422 b in stabilizer pad 418. In the fourth embodiment,two mounting plates are used to mount the resilient pad to the flanges,in other embodiments, more than two mounting plates may be used. In thethird and fourth embodiments, the mounting plate or mounting plates actas the base plate for the stabilizer pads.

A fifth embodiment of a stabilizer pad 518 in accordance with thepresent invention will now be described with reference to FIGS. 19 and20. Stabilizer pad 518 is similar to stabilizer pad 318 and like partsare labeled using the same reference numbers. The primary differencebetween stabilizer pad 518 and stabilizer pad 318 is that a mountingplate is not used to mount the resilient pad to the flanges. Rather,bolts are used to compress the rubber strips of the resilient padbetween the flanges of the stabilizer pad 518 as described below. Inthis embodiment, the resilient pad acts as the base plate of thestabilizer pad. Also the bolts function as a plate support of the pad.

Stabilizer pad 518 includes flanges 524 and 526 and resilient pad 540.Flanges 524 and 526 are similar to flanges 324 and 326 of stabilizer pad318, except that flanges 524 and 526 do not include right angle brackets332, and flanges 524 and 526 include mounting holes 545 for mounting theresilient pad to the flanges using bolts 549, washers 546 and nuts 548.

Resilient pad 540 includes rubber strips 550, each of which has holes562 for receiving the bolts 549. Resilient pad 540 differs fromresilient pad 340 in that pad 540 does not include metal brackets forcompressing the rubber strips 550. In stabilizer pad 518, the rubberstrips 550 are compressed together between the flanges 524 and 526 usingthe bolts 549 and the nuts 548. In the embodiment shown in FIGS. 19 and20, the holes 562 for the bolts 549 in the resilient pad 540 arecentered between a first planar surface 566 and a second planar surface568 of the pad 540. This allows the resilient pad to be reversible sothat either the first planar surface or the second planar surface ispositioned to contact the ground.

A sixth embodiment of a stabilizer pad 618 will now be further describedwith reference to FIGS. 21 and 22. Stabilizer pad 618 is similar tostabilizer pad 118 described above in that both have a substantiallyU-shaped frame made from a continuous steel sheet. Stabilizer pad 618differs from stabilizer pad 118 in that the degree of rotation from oneworking side of the stabilizer pad to the other working side is 180degrees for stabilizer pad 618 verses 135 degrees for stabilizer pad118.

The U-shaped frame of stabilizer pad 618 includes a base plate 622,flanges 624 and 626 and a resilient pad 640. Each of the flanges hasgrouser points 630. The resilient pad is mounted to mounting holes 639of the base plate 622 using bolts 649, washers 646 and nuts 648. Theresilient pad 640, like resilient pad 140, is formed using a pluralityof rubber strips 650 that are compressed using brackets 642 a and 642 band steel rods 652. In the embodiment shown, the steel rods 652 arewelded to each of the brackets 642 a and 642 b. Each of the brackets 642a and 642 b have right angle sections 643 having holes 644 for mountingthe resilient pad 640 to the base plate 622.

A seventh embodiment of a stabilizer pad 718 in accordance with thepresent invention will now be described with reference to FIG. 23.Stabilizer pad 718 is substantially identical to stabilizer pad 618except that the U-shaped frame of stabilizer pad 618 is replaced by twoflange sections 724 and 726. Each of the flange sections has grouserpoints 730 and a right angle bracket 722 having mounting holes 739 formounting the resilient pad to the flange sections.

In stabilizer pads 618 and 718, all of the grouser points 630 and 730are shown as being of approximately the same height. In other versions,the outermost grouser points on each of the flanges may be longer thanthe inner grouser points to provide four-point contact of the stabilizerpads at substantially the outermost points on the stabilizer pads tomaximize stability.

In other versions of the embodiment shown in FIGS. 21-23, the flangesand brackets can be modified to accommodate the resilient pad 140 shownin FIG. 4, or one of the reversible resilient pads shown in FIGS. 14, 17and 20.

The embodiments of the invention shown in FIGS. 11-23 do not include thecam 156 and the wheel 158 described above with respect to the stabilizerpad 118. As understood by one skilled in the art, to preventself-flipping of the stabilizer pads shown in FIGS. 11-23, the cam 156could be included on the stabilizer pads and the wheel 158 could beincluded on the arm.

Some embodiments of the present invention described above havereversible rubber pads. The reversible pads could be replaced withsingle-sided pads as understood by those skilled in the art.

One advantage of embodiments of stabilizer pads of the present inventionover prior art stabilizer pads is a reduction in manufacturing costs. Inthe first embodiment of the present invention, described above withreference to FIGS. 4-10, the U-shaped frame can be formed from one pieceof steel without requiring any welding. Alternatively, the U-shapedframe could be manufactured as a single cast piece. A further reductionin manufacturing costs is provided by the use of a single laminated padin place of the three laminated pads used in the prior art stabilizerpad shown in FIGS. 1-3. In addition to reducing manufacturing costs,stabilizer pads of the present invention are inherently structurallystronger than prior art pads and are therefore less susceptible to wearand have an extended operational life, even in adverse operatingenvironments. Also, the use of a reversible laminated pad significantlyincreases the life of stabilizer pads of the present invention.

In the prior art, one side of the resilient pad used with stabilizerpads is typically coupled to a rigid mounting member for mounting theresilient pad to the stabilizer pad. The resilient pads used inembodiments of the present invention are mounted to the stabilizer padat a central point in the pad to allow the pad to have two or moreworking surfaces to significantly extend the life of the pad. Inillustrative embodiments described above, resilient pads have twoworking surfaces. However, the present invention is not limited to padshaving two working surfaces, but includes pads with more than twoworking surfaces.

In embodiments of the present invention described above, stabilizer padsinclude flanges having grouser points for engaging a rough or gravelground surface. As understood by those skilled in the art, grouserpoints used with embodiments of the present invention are not limited totapered steel points formed in the flanges, but also include othergripping devices arranged on the stabilizer pad to enable the stabilizerpad to grip a rough or gravel surface to prevent the stabilizer pad fromslipping.

An eighth embodiment of a stabilizer pad 818 in accordance with thepresent invention will now be described with reference to FIGS. 24 and25. Furthermore, a ninth embodiment of a stabilizer pad 918 will alsonow be described with reference to FIGS. 26 and 27. Both of theseembodiments employ basic stabilizer pad constructions of the typedescribed, for example, in U.S. Pat. Nos. 4,761,021 and 5,050,904. Theseconstructions support the resilient pad laterally in a spacedside-by-side relationship rather than most of the earlier embodimentsdescribed herein in which the resilient pad is centrally supported.

With further specific reference to FIGS. 24 and 25, there is described astabilizer pad 818 supported from a stabilizer arm 814. For this supportthere is provided the bushings 836 and 837 for receiving the support pin834.

The pad itself is comprised of separate flanges 824 and 826. Each ofthese flanges has a respective base 823 and 825. For example, the flange824 is formed with a base 823 in a right angle arrangement and isconstructed of a single piece of heavy-duty metal.

Each of the flanges 824 and 826 have respective grouser points 831 and833. In this particular embodiment there are two grouser pointsassociated with each flange and the grouser points are disposedsymmetrically with respect to the bushings associated with each flange.This provides a stable grouser point construction when the pad is usedin rough terrain such as in dirt or gravel. In this regard, in theorientation of the pad illustrated in FIGS. 24 and 25, rather than thegrouser points contacting the ground, the resilient pads 840 are inposition for contact with a ground surface such as an asphalt orconcrete surface.

In the embodiment illustrated in FIGS. 24 and 25 the flanges 824 and 826are interconnected by a cross-piece 821 disposed at one end of each ofthe flanges. This provides an open center section that receives the arm814.

The embodiment of FIGS. 24 and 25 provides a quite simplified way ofattaching the resilient pad 840 to either of the flanges 823 or 825. Forthis purpose, each of the flanges is provided with a plurality of slots860. In the embodiment illustrated in FIG. 24 three slots 860 areprovided. However, it is understood that fewer or greater numbers ofslots can be employed.

Depending upon the number of slots provided, the resilient pad 840 islikewise cut-out on its top section to provide upstanding portions 866,each having a hole 864 extending therethrough, such as illustratedparticularly clearly in FIG. 25. Each of these upstanding portions 866extends through a corresponding slot 860 into the position illustratedin FIG. 24. A plurality of cross-rods 862 are then used. These extendinto the holes 864 and preferably provide a press-fit. The rods 862 arepreferably positioned against the top surface of the flange on eitherside and may be welded to the flange or secured in any other suitablemanner to the flange so that the cross-rods do not disengage.

Prior to assembly, the resilient pad 840 which is comprised of aplurality of rubber strips 850, is secured together. These individualstrips can be joined together by several different means such as bygluing, stapling, bolting or riveting. Also, the resilient pad 840 canbe a single piece molded block still having the cut slots defining theupstanding portions. Further, the strip could be left unglued.

Now, reference is made to the ninth embodiment of the present inventionillustrated in FIGS. 26 and 27. This embodiment, although similar to theembodiment of FIGS. 24 and 25, is different in that the resilient pad940 in the ninth embodiment is reversible. In this way the resilient pad940 can be removed and essentially rotated through 180° so that extendedwear of the pad becomes an important aspect of this particularconstruction.

With further reference to FIGS. 26 and 27 there is shown a stabilizerpad 918 that is comprised of flanges 924 and 926. These flanges aresimilar to the flanges illustrated in FIGS. 24 and 25 and thus includerespective grouser points 931 and 933. Instead of the single base pieceillustrated in the eighth embodiment, in the ninth embodiment, asillustrated clearly in FIG. 27, there are provided base pieces 923 a and923 b. Likewise, the flange 926 has associated therewith base pieces 925a and 925 b. Each of these base pieces extends at a right angle from itsassociated flange and the base pieces are spaced from each other apredetermined distance. Each of the base pieces is provided with a holeat the end thereof for receiving a stud 960, which in turn receives acorresponding cotter pin 962. The purpose of the stud and cotter pin isto secure the resilient pad 940 to these base pieces.

The flanges 924 and 926 are supported from the stabilizer arm 914 bymeans of the bushings 936 and 937 which receive the pivot pin 934. Also,the flanges are interconnected by means of the cross-piece 921illustrated in FIG. 27.

The resilient pad 940 is constructed of a number of individual strips orsegments 950. These segments are secured together and form a somewhatoblong shape. The shape could also be rectangular, circular, hexagon,triangular, octagon, or some other form and preferably has a lowercontact surface 941 and an upper contact surface 943. These two surfacesare preferably, but not necessarily, parallel to each other.

The resilient pad 940 is supported in a central manner and for thatpurpose there are provided slots 945 that extend through the pad. Thebase pieces extend into these slots and the pad is finally positioned inthe manner illustrated in FIG. 26. To hold the pad together, theindividually strips may be glued, stapled, bolted or riveted.Alternatively, the strip may be left unglued. Also, there is provided anend plate 966 also having slots corresponding to the slots in the padmaterial itself. As illustrated in FIG. 26 the studs 960 extend throughend holes in each of the base pieces. These studs may also bear againstthe outer surface of the end plate 966 and are held in position by meansof the aforementioned cotter pins 962.

Also, a bolt 964 of somewhat elongated construction extends through theresilient pad and through a hole 965 in the flange 924. The bolt 964 issecured by means of a washer 970 and a nut 968. The bolt 964 and itsassociated nut and washer is used, of course, on each of the padsassociated with the respective flanges 924 and 926.

As can be seen quite readily, in the embodiment of FIGS. 26 and 27, thepad 940 is reversible. This can be reversed by simply removing the bolt964 and the studs 960 and rotating the pads so that rather than surface941 being the ground contact surface, the surface 943 is the groundcontact surface.

A further embodiment of the present invention is now illustrated inFIGS. 28-33. This particular pad construction may be referred to as anoffset pad. It has been found that due to certain machine constraints,clearances between the pad and machine make this offset arrangement moreadvantageous. For example, machine tires or fenders may be arranged sothat a symmetrical type pad cannot be employed. The design in this lastembodiment provides an offset arrangement yet allowing the loading onthe resilient pads to be equalized. Proper pad balance may be achievedwithout the use of additional counterweights.

FIG. 28 is a depiction of a backhoe 875 with there being provided astabilizer arm 876 depicted as having the offset pad 880 affixedthereto. By way of example it is noted that a fender 877 is arranged ina manner so that if the symmetrical pad were to be used there would beinterference between the pad and the body of the vehicle. Accordingly,by means of this offset pad arrangement there is no interference betweenthe pad and any parts of the body of the vehicle.

The pad 880 is constructed with a base 882 having, as illustrated in,for example, FIG. 30, offset legs 890 and 891. Associated with legs 890and 891 are upstanding flanges 892 and 893, respectively. Each of theseflanges have a pair of grouser points 894 such as illustrated in FIG.33. FIG. 31 shows the pad in the position in which the grouser pointsare engaging the ground surface.

This last embodiment of the present invention also illustrates aresilient pad 975, one associated with each of the legs 890 and 891. Thepad 975 may be constructed of a series of separate resilient strips 976,all secured together and disposed within a U-shaped holder 977. Asillustrated in FIGS. 31-33, a series of rods 979 may be employed to holdthe resilient pad in the U-shaped holder 977. For a somewhat similar padconstruction refer to U.S. Pat. No. 4,761,021 which is herebyincorporated by reference hereinto.

As illustrated in FIG. 30, the offset legs 890 and 891 are of differentlength. Leg 890 is shorter than the leg 891. Accordingly, the resilientpad on the leg 890 is arranged more towards the outer end of the padconstruction while the pad associated with leg 891 is disposed moreinwardly of the pad construction.

This embodiment of the present invention also illustrates an importantconcept in a releasable latch. Although this releasable latch isillustrated with regard to the embodiment of FIGS. 28-33, such areleasable latch may also be used with other embodiments of the presentinvention described herein.

This embodiment of the invention illustrates the latch 980. The latch980 is supported from the arm by means of a pivot pin 982. Alsosupported from the arm is a fixed position stop 984. The latch 980 has aslot 986 for engaging with the stop 984. As illustrated is, for example,FIG. 31 a cam 988 is provided to interact with the latch 980. The cam988 is supported from bushing 990. The cam 988 may be a fixed metal rod.The releasable latch 980 is made of a resilient material. It may be ofmaterial 95 a Duro with a thickness of ⅞^(ths) inch.

Now, with regard to FIG. 31, it is noted that the latch is basically inits locked position. The stop 984 is engaged with the latch and the farend of the latch is in turn engaged with the cam 988. However, becausethe latch 980 is resilient it will allow the pad to reverse ifpotentially damaging obstacles are encountered when operating themachine.

Also, the latch can be released as is illustrated in FIG. 32. By pushingthe latch manually in the direction of arrow 991, the latch essentiallydisengages from cam 988. This permits the pad to then be rotated to theposition illustrated if FIG. 33 with the resilient pads now inengagement with the ground surface. In connection with the illustrationof FIG. 32, it is noted that the latch 980 has a tab 993 that functionsas a spring to return the latch to its locked position. In the positionof FIG. 33 the latch is in its locked position but is not in engagementwith the cam as the pad has been rotated to its other position.

In the previous embodiments described in FIGS. 4-33, as well as otherembodiments to be described hereinafter, the pad is shown as a laminatedpad with several separate pad layers. In other embodiments in accordancewith the invention, such as illustrated in FIG. 16, the pad may be asingle pad pack of laminated construction, or alternatively, a pad packof a single piece block or multiple blocks. When a block of resilientmaterial is used it may be molded or otherwise formed, such as bycutting from a larger block of resilient material. When individuallayers or strips are used they are preferably oriented vertically, asillustrated in FIG. 16, or could be oriented horizontally or angularly.When individual strips, blocks or layers are used they may be joinedtogether using various techniques such as gluing, stapling, screwing,nailing, riveting, bolting or welding. Also, the strips, blocks orlayers may be encapsulated by dipping, molding, coating, orshrink-wrapping with various components.

In at least some of the previous embodiments described in FIGS. 4-33, aswell as other embodiments to be described hereinafter, the pad isreversible. Not only that, but also, the pad is formed as a pad pack orpad assembly making the reversal of the pad very easy. The pad packs canbe stored, each as a unit, and in readiness for use. Also, the pad packarrangement makes it easy to reverse from one side of the pad to theother, without having to disassemble any part of the pad pack. This easeof use and reversal makes the pad more useable in the field. This isinvaluable, in that operating with worn out pads causes substantialdamage to paved surfaces. The repair of the damaged surface is typicallyan additional expense that can be readily avoided with the constructionof the present invention.

Reference is now made to FIGS. 34 through 36 for another embodiment ofthe present invention. This describes a stabilizer pad construction inwhich the resilient pad is directly supported from the arm of themachine. As with other embodiments described herein, the stabilizer arm1014 has the stabilizer pads 1018 supported therefrom by means ofopposite end pin segments of support pin 1016. In the version of FIGS.34 and 35, there are two pad packs supported, respectively, outboard oneither side of the arm 1014. Each pad pack is comprised of a pluralityof resilient pad layers 1019 that are held together by oppositelydisposed side plates 1020. Also shown in FIGS. 34 and 35 are throughpins 1022. These may be solid or hollow pins. In FIG. 34 two of theseare shown associated with each pad pack, however, any number of securingpins may be used. Each pin may be held to the side plate by beingflanged at the end. See also FIG. 37 for an illustration of the flangingoperation. Alternatively, the pins or rods may be welded at their endsto the side plates, or a bolting arrangement may be used

In FIGS. 34 through 36 each of the pad packs are supported directly fromopposite ends of the support pin 1016. Each of the pad packs is held toits associated pin segment by means of a sleeve 1024 which extendsthrough the pad pack, a washer 1026 and a cotter pin 1028. The sleeve1024 may be a permanent part of the pad pack and is readily engageableand disengageable with the pin 1016. The pin 1016 is preferably a singlepiece pin but could also be two separate pins. In the illustratedembodiment the pin 1016 is free to rotate in the arm 1014.

In the embodiment illustrated in FIGS. 34 through 36 the pad pack isreadily reversible so that either surface 1018A or 1018B may be used asthe ground engaging surface. A latch arrangement (not shown) may be usedfor holding the pad pack in a particular ground engaging surface. FIG.35 shows, in solid outline, the pad with the surface 1018A in groundengagement and also shows, in dotted outline, the rotation of the pad soas to change to the opposite surface. Also, in the embodiment of FIGS.34 and 35 the pad packs are separately supported and thus need not berotated from one position to the other in unison. Should the wear beuneven on either pad pack, then it is possible that only one pad packwill be reversed and the other maintained in the existing groundengaging position. FIG. 36 is a front elevational view of the padconstruction of FIG. 34, partially broken away to show the padconstruction.

In the embodiment illustrated in FIGS. 34 through 36 it is noted thatthere is no flanged weldment and instead, each of the pad packs ismounted in a relatively simple manner directly from the associated padsupport pin. This provides a relative simple and inexpensive, and yetdurable, pad construction.

FIG. 37 shows an alternate way of securing a hollow pin or tube 1023within the pad pack 1018. FIG. 37 also schematically illustrates theflaring or swaging tool 1025 that is closed in the direction of arrows1027 to flare the opposite ends of the securing tube 1023. The flaredend of the tube 1023 bear against the side plates and hold the laminatein a secure position, making for a tight pad pack. Any number ofsecuring tubes may be used, preferably at a minimum two, but usuallymore than two.

Reference is now made to FIGS. 38-41 for another embodiment of thepresent invention similar to that described in FIGS. 34 through 36. Inthis embodiment the stabilizer pad construction is also directlysupported from the arm of the machine. FIGS. 38-41 illustrate thestabilizer arm 1034, having supported therefrom, the resilient pad packs1032A and 1032B. Each of these pad packs is comprised of a plurality oflayers that are compressed together. In the particular embodiment ofFIGS. 38-41 bolts 1035 are used for securing the laminate layerstogether usually in a compressed state. The bolts 1035 extend betweenopposite side plates 1036. The outer facing plate 1036 may be loose andheld in position by the bolts 1035, while the inner facing plate 1036 ispreferably welded to the sleeve 1038 (see FIG. 40). A lug 1042 isprovided between the pad and the arm. The lug 1042 is welded to thesleeve 1038 as indicated at 1043. FIG. 40 also shows a further weld 1045between the side plate 1036 and the lug 1042. The through sleeve 1038 isshown in FIG. 40 positioned on the support pin 1040. The pad and sleeveare pinned or bolted to the pivot pin 1040. This is provided by the bolt1046. As illustrated in FIG. 39, there are bolts 1046 on either side ofthe arm 1034. By bolting the supporting pin with its associated pads,and providing the pin 1040 extending as a single piece pin through thearm, then the pads will rotate together.

FIGS. 38-41 also illustrate a stabilizing or latching arrangement thatwill inhibit the self-rotation of the resilient pad packs. Thisstructure is illustrated in FIGS. 38-41 as including resilient wheels1047 that are adapted to cooperate with anti-rotation lugs 1048. Thelugs 1048 are integral with the through sleeve 1038. FIG. 38 illustratesthe rotation of the pad in the direction of arrows 1049, and furtherillustrates the manner in which the lugs 1048 limit the rotationalmovement of the pad by engagement with one or the other of the resilientwheels 1047. FIG. 41 shows the pad 1032 in its normal,horizontally-disposed, position with the lugs 1048 out of engagementwith the wheels 1047. However, should the pad start to rotate dependingupon the terrain that it is engaging, the lugs 1048 engage with thewheels 1047 and inhibit any further rotation, other than to the extremepositions illustrated in FIG. 38.

The resilient wheels 1047 are constructed of a resilient material sothat they are capable of some deflection. Accordingly, when it isdesired to rotate from one position to the other, the arm of the machinemay be lifted and the operator may then rotate the pad with the lug 1048passing by the wheel 1047 with a certain amount of force being needed tobe applied by the operator to engage past the resilient wheel.

Reference is now made to FIGS. 42 and 43 for a further embodiment of thepresent invention similar to that illustrated in FIGS. 38-41 butemploying a pair of triangular shaped pads 1050. These pads 1050 arealso supported by means of a single common support pin 1052 that issupported from the stabilizer arm 1054. This embodiment also includesside plates 1055, bolts 1056, sleeves 1057, lugs 1058 and securing bolts1060. A resilient wheel latch arrangement is also provided in thisembodiment. For this purpose, associated with the sleeve 1057 are threeanti-rotation lugs 1062 that are adapted to engage with the tworesilient wheels 1064. Each of the two wheels 1064 are supported fromthe side of the stabilizer arm 1054 as illustrated in FIG. 43. Theinteraction of the lugs 1062 and the wheels 1064 operate in the samemanner as described in connection with the embodiment illustrated inFIGS. 38-41, inhibiting the rotation of the pad beyond a certain amountso as to prevent undesired self-flipping of the pad. The bolts 1060 thenengage with the lug and the support sleeve to provide for commonrotation between the oppositely disposed pads.

Reference is now made to still another embodiment of the presentinvention illustrated in FIGS. 44-47. In this particular embodiment thepad construction comprises a pair of laterally-disposed side plates orflanges 1066 that are supported from the stabilizer arm 1067 by means ofthe support pin 1068. The pin 1068 is received by the stabilizer arm1067 and extends on either side of the arm for support of the sideplates 1066. The pin 1068 may be free to rotate in the arm 1067. The pin1068 may also be free to rotate relative to the flanges, or may be fixedagainst rotation relative to the flanges. The side plates may besupported in a manner as previously described in conjunction withearlier embodiments such as those illustrated in FIGS. 4 and 5.

In the embodiment of FIGS. 44-47 there is illustrated the laminatedresilient pad 1070 that is secured along a lower edge 1071 of therespective side plates or flanges 1066. The laminated resilient pad 1070is secured by means of three through bolts 1072. The pad itself is alaminated pad constructed of a plurality of secured resilient padlayers. All working loads associated with the apparatus are transferredfrom the resilient pad material to the side flanges or plates throughthe pad-supporting member whether it be by means of pins, rods, bolts,lugs, bars, plates, or the like.

The construction illustrate in FIGS. 44-47 also preferably includes aconnecting plate 1074 that extends between the laterally disposed sideplates 1066. Preferably, the front of the plate 1074 is turned upwardlyas indicated at 1075 in FIG. 44. The plate 1074 is primarily for supportbetween the side plates 1066 and is positioned spaced above the padpack, out of contact therewith.

In the embodiment illustrated in FIGS. 44-47 the laminated resilient pad1070 is also reversible. Once one of the wear surfaces becomes worn downor damaged, the bolts 172 may be withdrawn and the pad can then bereversed so that the opposite side of the pad becomes the groundengaging surface. The bolts are then reinserted and tightened.

This embodiment of the present invention also employs a latch pin 1076and associated hitch pin 1077. The side plates 1066 are provided withholes 1078 for receiving the latch pin 1076. Each of the holes has akeyway slot for receiving the head 1079 of the latch pin 1076. There isa small hole in the head 1079 of the latch pin 1076 for receiving thehitch pin 1077. FIG. 47 is an exploded view showing the variouscomponents of the latch arrangement including the latch pin 1076 and thehitch pin 1077. The latch pin 1076 is shown in FIG. 44 in its storedposition, out of use. In this stored position the pin does provide somelimited inhibiting of rotation of the pad assembly. In an alternateembodiment the latch pin 1076 can be secured by other means such as abolt and nut or a large cotter key with a hitch pin.

In FIGS. 44 and 45 it is noted that there are a pair of holes 1078 forreceiving the latch pin in either of two different positions dependingupon whether the resilient pad is going to be engaging the ground orwhether the grouser end 1073 is going to be engaging the ground. In FIG.44 the resilient side of the pad is engaging the ground while in FIG. 45the pad has been moved to a position wherein the grouser points at 1073are engaging the ground. It is furthermore noted that the rotation fromone position to the other is not through 180° but instead is throughapproximately only a 90° rotation of the resilient pad construction. InFIG. 44 the latch pin 1076, in its stored position, is shown disposedbetween the end of the arm 1067 and the plate 1074. The latch pin 1076is held in position by the hitch pin 1077 passing through the hole inthe head 1079 of the latch pin 1076. In the position illustrated in FIG.45 the latch pin is inserted in the other hole, the entire pad assemblyhaving being rotated through 90° to the position illustrate in FIG. 45.In this position the latch pin is reinserted and the hitch pin 1077engages the latch pin to lock it in position. In this position the latchpin 1076 is disposed under the arm 1067 basically holding the pad in theposition illustrated in FIG. 45 preventing any significant rotation ineither direction. This is desired when the grouser points are engagingthe ground in order to provide a firm hold by the grouser end of thepad. It is also noted in this position that the end 1075 of the plate1074 is about into engagement with the end of the stabilizer arm toinhibit rotation.

Reference is now made to FIGS. 48-51 for another embodiment of thepresent invention employing a readily reversible pad pack that can beengaged with the weldment in either of alternate positions. The reversalof the pad enables enhanced life of the overall pad construction becauseafter one surface has been worn down the pad can be reversed and theopposite surface can then be used as the ground engaging surface.

In the embodiment of FIGS. 48-51, the weldment is comprised of a pair oflaterally disposed plate members or flanges 1086 that are supported fromthe stabilizer arm 1087. A pin 1088 pivotally supports the side plates1086 from the stabilizer arm 1087. The laminated resilient pad 1080 isconstructed as a pad pack, illustrated in the exploded view of FIG. 50as comprising a series of laminated layers 1081 that are held togetherby appropriate means such as the securing members 1082. In theembodiment illustrated in FIG. 50 there are six such members that areemployed, although fewer or greater numbers may be employed. Thelaminated pad 1080 also has a centrally disposed through-hole 1083 forreceiving the retaining bolt 1084.

FIG. 51 illustrates the construction of the pad pack 1080, including thesecuring members for holding the pad together. This may include a centerrod 1090. The laminated pad is drilled to snugly receive the rod 1090.The rod 1090 may be, for example, a thee-quarter inch diameter rod thatis adapted to snugly or even force fit through the laminated padassembly. A three-quarter inch washer 1091 is placed over the end of therod against the end laminate layer. A metal side plate may also be usedbetween the washer and the end laminate layer. The laminate layers arepreferably compressed to a proper width and a one inch outside diametersleeve 1092 is slid over the end of the rod and tack-welded as indicatedat 1093 in FIG. 51. This arrangement holds the laminate construction inan integral pad pack configuration. FIG. 50 shows the angled slots 1095in which the sleeve is adapted to mate. It is noted that these slots arepreferably angled, although they could also be disposed perpendicular tothe bottom edge of the flange. Once the sleeves are placed in the slots,then the resilient pad pack is maintained in position by inserting theretaining bolt 1084 through the hole 1083 in the pad as well as throughthe hole 1096 in each of the side plates 1086. FIG. 51 also shows inphantom outline a skirt 1097 that may be used to cover the ends of thesleeves 1092. This may be tack-welded as indicated at 1098.

FIG. 52 is a fragmentary cross-sectional view of an alternate embodimentof pad construction. This illustrates a fragment of the laminate layers1101 being held together by a steel pipe 1102. The steel pipe may havean outer diameter of three quarters of an inch. This pipe may be peenedover in order to retain the sleeve 1103 and washer 1104. Thisarrangement is useable instead of providing welding.

FIGS. 53A and 53B illustrate still a further alternate arrangementillustrating a fragment of a pad at 1106 the use of a supporting rod1108. This may be a one inch outer diameter rod or pin that is force-fitinto an undersized hole through the resilient rubber pad. By providingan undersized hole and force-fitting, no further retainers are necessaryand the pin will remain in a position wherein it extends a slightdistance from either end of the laminate pad for engagement with theslots in the side plate.

Reference is now made to FIG. 54 which is a perspective view of afurther alternate embodiment of a pad construction. This padconstruction is similar to that described in FIG. 48 including sideplates 1110 and interconnecting plate 1112 with the turned lip 1113 ateither end. At one end the lip is turned up and at the other end it isturned down. The resilient rubber pad construction may be substantiallyidentical to that described in FIG. 50 employing end sleeves that areadapted to engage in lower slots of the side plates. This embodimentalso illustrates a pair of skirts 1114 that may be tack-welded at 1115.These skirts are used to protect the mounting slots from distortionduring the use of the pad. FIG. 54 also illustrates a retaining pin 1116that may be used in place of the retaining bolt 1084 illustrated in FIG.50. The retaining pin 1116 may a three quarter inch diameter rod that isforce-fit into an undersized hole in the pad. This pin may be pushed outwith a hammer and drift pin. The pin 1116 when removed enables thereversal of the resilient rubber pack. The retaining pin 1116 may alsobe in the form of a bar, plate or other elongated member, and may bealternatively secured by being molded into a solid pack so that it wouldthereby be an integral part of the pack.

In accordance with still a further alternate version of the invention,and with reference to the embodiment of FIG. 54, the through hole in thepad can actually be of larger diameter than the pin or other supportbar, thereby simplifying the pad assembly construction, with the pin orbar being glued into place. Alternatively, the pin or bar could besupported loosely in the through hole or passage, but would be retainedin place by means of the side skirts 1114, when the pack is installedbetween the side flanges or plates 1110. In this arrangement the padpack is preferably of laminated construction and is held together, suchas by the aforementioned techniques including gluing in order to providea self-supporting pad pack.

Reference is now made to a further embodiment of the present inventionillustrated in FIGS. 54A-54D. This embodiment of the invention issimilar to that described in FIG. 48. The stabilizer pad constructionincludes a pair of laterally disposed side flanges or plates 1120 thatis supported, by means of rotating pin 1124, from the distal end of thestabilizer arm 1122. The lateral flanges or plate members 1120 aresubstantially the same as described in FIG. 50 including at their loweredge receiving slots 1126. The slots 1126 receive the end sleeves 1128at the ends of the support rods 1129 of the resilient pad pack 1130. Thelaminate rubber pad 1130 also is provided with a through hole 1133 thatreceives the retaining pin 1134. The retaining pin 1134, as in theembodiment of FIG. 50, is also received by the hole 1135 in each of thelateral plates 1120.

The laminate rubber pack 1130 is meant to engage the lateral side plates1120 in the same manner as described in connection with FIG. 50. Theprimary difference between the embodiment of FIG. 54 and that of FIG. 48is that the embodiment of FIG. 54D now includes a T-bar 1138 thatprovides support between the cross-plate 1140 and the pad pack 1130. Thecross-plate 1140 extends between the lateral side plates 1120. It isnoted that the opposite ends of the cross-plate 1140 are turned down asindicated at 1141. This assists in retaining the T-bar 1138 in position,as illustrated in the cross-sectional view of FIG. 54C. The T-bar 1138is generally free-floating between the pad and plate 1140, and providessome transfer of forces fro the pad to the weldment, and from there, tothe arm of the machine.

The laminated pad 1130, as noted, has a gap 1144 between opposite sidelaminate sections. In the preferred arrangement the securing rods 1129are force-fit with the laminate leaving the gap 1144 between thedifferent side sections. This gap allows for easy assembly and provideslooser tolerances for the compressed rubber strips or layers. This gapis sized to receive the base of the T-bar 1138, as illustrated in FIG.54B.

As illustrated in FIGS. 54B and 54C, the bottom of the T-bar 1138disposed above the rods 1129. Deflective forces against the bottom ofthe pad are transferred through the rods to the T-bar 1138 and thecross-plate 1140. This prevents the bending of the rods 1129.

FIGS. 54A and 54D also illustrate a latch arrangement including thelocking pin 1147 that engages between the side walls 1120. The lockingpin 1147 has an extending leg 1148 that is secured by means of the hitchpin 1150. The latch pin is shown in its storage position in FIG. 54A. Itis also noted that the side plates 1120 also have another hole forreceiving the locking pin 1147 so that when the pad is moved to thegrouser point engaging position, as in FIG. 49, the locking pin 1147 canretain the pad in that position. Refer to the discussion hereinbeforeregarding the use of the pin 1076 in the version of FIG. 45. In theembodiment of FIG. 54A the hitch pin 1150 is used in the same locationto retain the locking pin in place, holding the grouser points in a firmposition in ground engagement.

Reference is now made to FIGS. 55-57 for another version of a latcharrangement in accordance with the present invention. This particularembodiment of the pad construction includes a weldment 1160 thatsupports three pad assemblies 1162. The metal weldment 1160 is providedon the opposite side with grouser points 1163. The weldment 1160 issupported for rotation from the stabilizer arm 1165 by means of thesupport pin 1168. In FIG. 55 the stabilizer pad construction is shown ina position in which the grouser points are facing downwardly.

FIGS. 55-57 also show the latch arrangement that is employed with thisstructure. This includes the pivotal latch 1170 which is shown in solidoutline in FIGS. 55 and 56 as having its leg 1171 in a position over theedge of the weldment 1160.

In this position the weldment and the whole pad assembly are preventedfrom rotation to the resilient pad side. This prevents self-flippingfrom the grouser point side to the resilient pad side of the assembly.FIG. 56 also shows, in phantom outline, the latch 1170 moved to itsunlocked position enabling the pad assembly to be rotated from one sideto the other.

The latch arrangement depicted in FIGS. 55-57 also includes, in additionto the latch member 1170, support plates 1174 and elongated bolts 1176.The bolts 1176 are used to clamp the plates 1174 about the stabilizerarm 1165. The latch 1170 is adapted to rotate about one of the bolts1176 between the two opposite positions illustrated in FIG. 56 includinga latching position and an unlatched position.

FIG. 57 illustrates a bushing 1180 that provides the support between thebolt shaft and the latch 1170. This bushing limits the squeezing of theelastomeric material of the latch 1170 so as to provide proper frictionagainst any inadvertent rotation. The latch 1170 also includes a stoppin 1182. The pin 1182 extends from the polyethylene latch 1170. In theposition shown in solid outline in FIG. 56, the stop pin 1182 is buttedup against the end of the plate 1174. This limits the position of thelatch in the counter clock-wise direction of rotation. In the positionshown in FIG. 56 in phantom, the stop pin also limits the clock-wiserotation of the latch by bearing against the end of the plate 1174.

The bushing 1180 is preferably press fit into the elastomeric materialof the latch 1170. The sleeve of the bushing is slightly longer than thehole depth in the latch so as to slightly stick out therefrom. As thebushing is clamped, the friction between the bushing and latch providessome resistance to rotation, so that the latch will not inadvertentlyrotate from one position to the other.

In the embodiment of FIG. 55 it is noted that the latch is secured tothe arm 1165. In another embodiment of the invention the latch may besecured to the pad itself, and be positioned to engage and disengagewith the arm to prevent rotation.

Reference is now made to FIGS. 57A-57C for another version of a latcharrangement in accordance with the present invention. This particularembodiment of the pad construction includes a weldment 1260 thatsupports two pad assemblies 1262. The metal weldment 1260 is comprisedof metal flanges 1263 that may be interconnected by a plate 1240. Eachflange 1263 is provided on the opposite side with grouser points 1264.The weldment 1260 is supported for rotation from the stabilizer arm 1265by means of the support pin 1268. In FIG. 57A the stabilizer padconstruction is shown in a position in which the grouser points arefacing downwardly for ground engagement.

FIGS. 57A-57C also show the latch arrangement that is employed with thisstructure. This includes the pivotal latch 1270 which is shown in solidoutline in FIGS. 57A and 57B as having its leg 1271 in a position overthe edge of the flange 1263. In this position the weldment and the wholepad assembly is prevented from rotation to the resilient pad side. Thisprevents self-flipping from the grouser point side to the resilient padside of the assembly. FIG. 57C also shows, in phantom outline, the latch1270 moved to its unlocked position enabling the pad assembly to berotated from one side to the other.

The latch arrangement depicted in FIGS. 57A-57C also includes, inaddition to the latch member 1270, support plates 1274 and elongatedbolts 1276. The bolts 1276 are used to clamp the plates 1274 about thestabilizer arm 1265. The latch 1270 is adapted to rotate about one ofthe bolts 1276 between the two opposite positions illustrated in FIG.57C including a latched position and an unlatched position.

FIG. 57B illustrates a bushing 1280 that provides the support betweenthe bolt shaft and the latch 1270. This bushing limits the squeezing ofthe elastomeric material of the latch 1270 so as to provide properfriction against any inadvertent rotation. The latch 1270 also includesa stop pin 1282. The pin 1282 extends from the polyethylene latch 1270.In the position shown in solid outline in FIG. 57C, the stop pin 1282 isbutted up against the end of the plate 1274. This limits the position ofthe latch in the counter clock-wise direction of rotation. In theposition shown in FIG. 57C in phantom, the stop pin also limits theclock-wise rotation of the latch by bearing against the end of the plate1274.

The bushing 1280 is preferably press fit into the elastomeric materialof the latch 1270. The sleeve of the bushing is slightly longer than thehole depth in the latch so as to slightly stick out therefrom. As thebushing is clamped, the friction between the bushing and latch providessome resistance to rotation, so that the latch will not inadvertentlyrotate from one position to the other.

In the embodiment of FIG. 57A it is noted that the latch is secured tothe arm 1265. In another embodiment of the invention the latch may besecured to the pad itself, and be positioned to engage and disengagewith the arm to prevent rotation.

Reference is now made to a further embodiment of the present inventionillustrated in FIGS. 58-60. This embodiment of the invention is similarto that described in, for example, FIG. 48. However, in this particularembodiment the pad does not have both resilient pad and grouser pointopposed sides. In FIGS. 58-60 the weldment is meant primarily only forengagement with surfaces that are best suited for use with a resilientpad construction, such as on concrete or asphalt surfaces. Thestabilizer pad construction includes a pair of laterally disposed sideflanges or plates 1220 that is supported, by means of rotating pin 1224,from the distal end of the stabilizer arm 1222. The lateral flanges,plates or plate members 1220 are substantially the same as described inFIG. 14, but instead include at their lower edge receiving slots 1226.See also the embodiment of FIG. 48 using slots for receiving the padpack rods. The slots 1226 in the version of FIG. 58 are vertical slotsrather than angled slots. The slots 1226 receive the ends 1228 of thesupport rods 1229 of the resilient pad pack 1230. The laminate rubberpad 1230 also is provided with a pair of through holes 1233 that receiverespective retaining pins 1234, and as depicted in FIG. 60. Theretaining pins 1134 are also received by the holes 1235 in each of thelateral side plates 1220.

The laminate rubber pack 1230 is meant to engage between the lateralside plates 1220 in the same manner as described in connection with, forexample, FIG. 50. To provide additional support between the side platesthere may also be provided a cross-plate 1240 extending between thelateral side plates 1220. It is noted that the opposite ends of thecross-plate 1240 are welded to the side plates, and preferably a smallgap is provided between the cross-plate 1240 and the pad pack 1230, asdepicted in FIG. 59.

The pad pack 1230, shown as a separate item in FIG. 60, is formed of aplurality of laminated rubber layers that are stacked together to formthe pack. These layers may be compressed and the support rods thenengaged. The support for the pack is preferably about midway of the packso that it can be readily reversed from one working surface to theother. These working surfaces are depicted in FIG. 60 as ground engagingor working surfaces 1221 and 1223.

In previous embodiments described herein a force fit has been used tosecure the rods or pins 1229 in place. However, there may be a need incertain applications to secure these pins or rods more positively. Inthe embodiment of FIGS. 58-60 this is accomplished by means of a pinstructure that is in the form of a reinforcing rod or other roughenedsurface rod or pin. This surface is most clearly depicted in FIG. 59 at1241 in the form of a diagonal rib pattern similar to that used in areinforcing rod typically used in cast concrete construction. The ends1228 may be formed without the reinforcing ribs so as to easily matewith the slots in the side plates.

A jig or the like may be used to stack the laminate layers 1231 with thelayers having been drilled with holes of a diameter so that the rods1229 have to be force-fitted into the holes. In this way the rods areheld firmly in place and the laminate layers are also firmly stackedagainst each other. This forms a unitary pad pack 1230 that can beeasily secured in place with the use of only a couple of securing pins1234 and associated nuts. In other embodiments of the invention only asingle securing pin, or the like may be used.

Furthermore, the pad pack is also readily reversible once one sidethereof is worn down. The pad pack is then disassembled by removal ofthe securing pins 1234 and the pad pack is reversed in position. Forexample, if the surface 1223 is first the working surface and gets worndown, the pad pack can then be reversed 180 degrees so that the surface1221 then is facing downwardly and functions as the ground-engagingsurface. The embodiment depicted in FIG. 58 can also be provided with agrouser point side so that, not only is the pad pack reversible, but theweldment itself can be reversed between respective resilient and grouserpoint sides.

In the embodiment depicted in FIGS. 58-60 it is noted that the sides ofthe pad pack are supported essentially only by the side plates 1220. Inanother variation of this embodiment separate side pieces or plates maybe provided. This is depicted in the embodiment shown in FIG. 61 whichis a perspective view illustrating the pad pack 1243 having, on oppositesides thereof, the additional side plates 1244. FIG. 61 also shows thesecuring or retaining pins or rods 1246 that extend through thelaminated layers. Each of the rods 1246 is secured to the plates 1244 ateach end by a weld depicted at 1247. FIG. 62 also shows one of the tworetaining pins 1248 that are used to hold the pad pack to the weldment.In FIGS. 61 and 62 the opposite ends of the rods 1246 are received inslots of the weldment, such as in the manner that is depicted in FIG.58.

In the previous embodiments of FIGS. 58-62 one purpose for thestructures disclosed is to prevent the support rods from slipping out ofthe pad pack during the heavy duty use of the machine. In FIG. 58 areinforcing bar is used, while in FIG. 61 end plates are used welded tothe support rods. Still another means of holding the supporting rods ofthe pad pack in place is depicted in FIG. 63. This embodiment depicts apad assembly comprising a pad pack 1250 that includes a plurality ofseparate but joined pad layers in a laminate form, and side plates 1252of a weldment. The pad pack may be held between the side plates in thesame manner as depicted in, for example, FIG. 58 but without the use ofany supporting cross-plate. As in FIG. 58, a series of spaced supportrods may be employed, along with one or two securing pins that hold thepad pack to the weldment.

The support rods 1254 are depicted in FIG. 63 as engaging with thecorresponding side plates 1252. In order to prevent lateral movement,such as in the directions illustrated by double-headed arrow 1255,instead of providing through holes in the side plates, only a partialgroove 1256 is used at each end of the rod and in each said plate 1252.A separate groove 1256 can be provided for each support rod 1254. Thesecuring pins pass through the side plates and pad pack in the mannerdepicted in FIG. 60. It can readily be seen that with the use of thegrooves 1256, the rod 1254 is prevented from lateral movement, thismovement essentially being blocked by the wall 1257 of the side platesthat at least partially define the groove 1256.

Reference is now made to a further embodiment of the present inventionillustrated in FIGS. 64 and 65. FIG. 64 is a perspective view and inwhich the pad support rods engage in a horizontal slot, rather than theindividual vertical slot of FIG. 63. FIG. 65 is a fragmentarycross-sectional view taken along line 65-65 of FIG. 64. This embodimentof the invention is similar to that described in, for example, FIG. 58.In FIGS. 64 and 65 the weldment is meant primarily only for engagementwith surfaces that are best suited for use with a resilient padconstruction, such as on concrete or asphalt surfaces. The stabilizerpad construction includes a pair of laterally disposed side flanges orplates 1320 that are supported, by means of rotating pin 1324, from thedistal end of the stabilizer arm 1322. The lateral flanges or platemembers 1320 are substantially the same as described in FIG. 58, butinstead include at their lower edge a single horizontally-disposedreceiving groove or slot 1326.

The groove 1326 receives the ends of the support rods 1329 of theresilient pad pack 1230. In this embodiment, rather than providing oneslot for each support rod, there is provided a single horizontal groove1326. With this arrangement the pad pack is engaged horizontally ratherthan vertically with the weldment with one end of all of the supportrods 1329 passing through the single groove 1326. The securing pins 1331are then used in the same manner as in FIG. 60 to hold the pad pack withthe weldment.

The laminate rubber pad 1330 also is provided with a pair of throughholes that receive respective retaining pins 1331. The retaining pins1331 are also received by holes in each of the lateral plates 1320.

The laminate rubber pack 1330 is meant to engage between the lateralside plates 1320 in the same manner as described in connection with, forexample, FIG. 50. To provide additional support between the side platesthere may also be provided a cross-plate 1340 extending between thelateral side plates 1320. It is noted that the opposite ends of thecross-plate 1340 may be welded to the side plates, and preferably asmall gap is provided between the cross-plate 1340 and the pad pack1330, as depicted in FIG. 64.

The pad pack 1330, shown in FIG. 64, is formed of a plurality oflaminated rubber layers that are stacked together to form the pack. Thesupport for the pack is preferably about midway of the pack so that itcan be readily reversed from one working surface to the other. Theseworking surfaces are depicted in FIG. 60 as ground engaging or workingsurfaces 1321 and 1323.

Reference is now made to a further alternate version of the invention asdepicted in FIG. 66. This cross-sectional view is similar to thatillustrated in FIG. 65, but instead of providing a groove or grooves inthe side plates, a slot 1350 is provided in conjunction with a stepped(reduced diameter) end 1352 of each support rod 1354. A pair ofretaining pins are also employed in this version for holding the padpack in the weldment. The reduced diameter end 1352 of the support rodforms a flange or shoulder that butts up against an inner surface of theside plate 1356 preventing any lateral movement of the support rod 1354.These ends 1352 are provided at both ends of the support rod.

FIG. 66A shows another version in which the support rod 1360 has astepped, smaller diameter end 1362, while the side plates 1364 are alsoformed with a slot that is stepped as illustrated at 1366.

Reference is now made to still a further embodiment of the presentinvention illustrated in FIGS. 67-69. FIG. 67 is a perspective view inwhich the pad pins engage corresponding vertical slots. FIG. 68 is afragmentary cross-sectional view taken along line 68-68 of FIG. 67. FIG.69 is a fragmentary cross-sectional view taken along line 69-69 of FIG.67. This embodiment of the invention is similar to that described in,for example, FIG. 58, but employs a different means for holding the padsupport rods 1430 in place. In FIGS. 67-69 the weldment is meantprimarily only for engagement with surfaces that are best suited for usewith a resilient pad construction, such as on concrete or asphaltsurfaces. In an alternate embodiment the weldment may be additionallyprovided with grouser points in which case the entire weldment is meantto be reversible between the resilient pad side and the grouser pointside. The stabilizer pad construction includes a pair of laterallydisposed side flanges or plates 1420 that are supported, by means ofrotating pin 1424, from the distal end of the stabilizer arm 1422. Thelateral flanges or plate members 1420 are substantially the same asdescribed in FIG. 58, including vertical slots 1432 at their lower edgefor receiving the support rods 1430.

The laminate rubber pad 1450 also is provided with a pair of throughholes that receive respective retaining pins 1451. See FIG. 69 where twopins are used. Fewer or greater than two pins may be provided. Theretaining pins 1451 are also received by holes in each of the lateralplates 1420. FIG. 69 also shows the addition of a sleeve 1460 disposedwithin a hole in the side plate 1420 and for receiving the securing pin1451.

The laminate rubber pack 1450 is meant to engage between the lateralside plates 1420 in the same manner as described in connection with, forexample, FIG. 50. To provide additional support between the side platesthere may also be provided a cross-plate 1440 extending between thelateral side plates 1420. It is noted that the opposite ends of thecross-plate 1440 may be welded to the side plates, and preferably asmall gap is provided between the cross-plate 1440 and the pad pack1450, as depicted in FIG. 69.

The pad pack 1450, shown in FIG. 67, is formed of a plurality oflaminated rubber layers that are stacked together to form the pack. Thesupport rods may be press fit or force fit with the laminate layers.These rods may also be provided with a roughened or abraded externalsurface to help to hold them in place. A clamping bar 1462 is alsoillustrated in FIGS. 68 and 69 on one side of the laminate layers. Thisclamping bar may be provided as illustrated in, for example, FIG. 61 tohold at least one side of the laminate pack. A pair of clamping bars mayalso be provided at opposite sides of the pad pack. The support for thepack is preferably about midway between working surfaces of the pack sothat it can be readily reversed from one working surface to the other.These working surfaces are depicted in FIG. 68 as ground engaging orworking surfaces 1421 and 1423.

To retain the pad pack in place, and in particular the support rods1430, there is also provided on either side of the pad pack theretaining side plates 1464. The side plates 1464 retain the ends of thesupport rods 1430 preventing them from moving in either direction andout of the pad pack. As shown in FIG. 68 the rods 1430 are preferablyflush with the outer surface of the side plates 1420. The side plates1464 thus cover the end of each rod 1430 to prevent each of them frommoving laterally. As illustrated in FIG. 69, the side plates are held inposition my means of the retaining pins 1451. These pins extend throughholes in the side plates 1464, the clamping bar 1462 and the laminatepad pack 1450.

In the embodiment of FIGS. 67-69 there is provided a sleeve 1460 and aclamping bar 1462. In an alternate embodiment these elements may beremoved. In that case the laminate may then be made wider as is apparentfrom FIG. 69.

Reference is now made to FIGS. 70-72 for a further illustration of theprinciples of the present invention. FIG. 70 is a fragmentarycross-sectional view similar to that illustrated in FIG. 69 showing theworn laminate pad before reversing the position thereof. FIG. 71 is anexploded cross-sectional view with a first step in reversing the pad bydisassembling components. FIG. 72 is a cross-sectional view similar tothat shown in FIG. 70 and illustrating the pad having been reversed andclamped in place. In FIGS. 70-72 the same reference numbers are used asidentified in FIGS. 67-69.

In FIG. 70 the pad pack 1450 is shown in a worn condition with the wornsurface 1455 illustrated as almost worn to the level of the side plates1420. This occurs after substantial use of the pad in that particularposition. FIG. 71 illustrates the pad pack being reversed, at an initialstage wherein the retaining pins 1451 have been disengaged. Theretaining pins 1451 are threaded at their end, as illustrated, toreceive the nut 1457. When the nut is removed then the assembly can bedismounted. The retaining pins are withdrawn, along with the side plates1464. This allows one to reverse the position of the pad pack so thatthe worn side 1455 is now facing upwardly. FIG. 71 thus illustrates theunused surface 1459 as the downwardly facing work surface of the padpack 1450. Lastly, FIG. 72 shows the pad pack then reassembled with theretaining pins secured in place.

Reference is now made to a further embodiment of the present inventionillustrated in FIGS. 73-75. This embodiment of the invention is similarto that described in, for example, FIG. 58. In this particularembodiment the pad does not have both resilient pad and grouser pointopposed sides. In FIGS. 73 and 74 the weldment is meant primarily onlyfor engagement with surfaces that are best suited for use with aresilient pad construction, such as on concrete or asphalt surfaces.This pad may also be referred to as a “street pad”. The stabilizer padconstruction includes a pair of laterally disposed side flanges orplates 1520 that is supported, by means of rotating pin 1524, from thedistal end of the stabilizer arm 1522. The lateral flanges, plates orplate members 1520 are substantially the same as described in FIG. 58,including at their lower edge receiving slots 1526. See also theembodiment of FIG. 48 using slots for receiving the pad pack rods. Theslots 1526 in the version of FIG. 73 are vertical slots rather thanangled or tapered slots. The slots 1526 receive the ends 1528 of thesupport members, posts or rods 1529 of the resilient pad pack 1530.These ends may also be referred to as lugs or posts. The laminate rubberpad 1530 also is provided with a pair of through holes that receiverespective retaining pins 1534, and as depicted in FIGS. 73 and 74. Theretaining pins or bolts 1534 are also received by holes 1535 in each ofthe lateral side plates 1520. In FIGS. 73 and 74 the retaining pins arein the form of elongated bolts, each with an end securing nut, asillustrated. In other embodiments other types of securing members may beused such as rods with end slots for receiving horseshoe clips or otherretaining pieces.

The laminate rubber pack 1530 is meant to engage between the lateralside plates 1520 in the same manner as described in connection with, forexample, FIG. 58. To provide additional support between the side platesthere may also be provided a cross-plate 1540 extending between thelateral side plates 1520. It is noted that the opposite ends of thecross-plate 1540 are welded to the side plates, and preferably a smallgap is provided between the cross-plate 1540 and the pad pack 1530, asdepicted in FIG. 74.

In the embodiment of FIGS. 73 and 74 the pad pack 1530 is formed of aplurality of laminated rubber layers 1531 that are stacked together toform the pack. These layers may be compressed and the support rods 1529then engaged. The support for the pack is offset of midway of the pack,but is still readily reversible from one working surface to the other.These working surfaces are depicted in FIG. 74 as ground engaging orworking surfaces 1521 and 1523.

In previous embodiments described herein a force fit has been used tosecure the rods or pins 1529 in place. However, there may be a need incertain applications to secure these pins or rods more positively. Inthe embodiment of FIGS. 58-60 this is accomplished by means of a pinstructure that is in the form of a reinforcing rod or other roughenedsurface rod or pin. This surface is most clearly depicted in FIG. 59 at1241 in the form of a diagonal rib pattern similar to that used in areinforcing rod typically used in cast concrete construction. The ends1228 may be formed without the reinforcing ribs so as to easily matewith the slots in the side plates. In the embodiment of FIG. 73 eithersmooth or reinforced rods may be used.

A jig or the like may be used to stack the laminate layers 1531 with thelayers having been drilled or punched with holes of a diameter so thatthe rods 1529 have to be force-fitted into the holes. In this way therods are held firmly in place and the laminate layers are also firmlystacked against each other. This forms a unitary pad pack 1530 that canbe easily secured in place with the use of only a couple of securingpins 1534 and associated nuts. In other embodiments of the inventiononly a single securing pin, or the like may be used, particularly wherethe slots are angled. Also, the securing pins or bolts can be reusablewhen one replaces a worn pad. New pad packs could thus be sold withoutrequiring that the pins be sold with them.

Furthermore, the pad pack is also readily reversible once one sidethereof is worn down. The pad pack is then dis-assembled by removal ofthe securing pins 1534 and the pad pack is reversed in position. Forexample, if the surface 1523 is first the working surface and gets worndown, the pad pack can then be reversed 180 degrees so that the surface1521 then is facing downwardly and functions as the ground-engagingsurface. The embodiment depicted in FIG. 73 can also be provided with agrouser point side so that, not only is the pad pack reversible, but theweldment itself can be reversed between respective resilient and grouserpoint sides.

The embodiment illustrated in FIG. 73 is similar to the embodiment ofFIG. 58. However, in FIGS. 73 and 74 one side of the pad pack is madewith a larger dimension wear surface or area. This is clearly depictedin FIG. 74 where the wear area shown by dimension W2 is about threetimes larger or deeper than the wear area shown by the dimension W1.This provides a larger initial wear area. Once this surface 1523 is worndown then the pad can be reversed so that the surface 1521 becomes theground engaging wear surface.

Another variation to that described in FIG. 73 uses a pad that is notmeant to be reversed. This has the advantage of being able to use lessresilient material in the pad. The can thus be made cheaper. Inconnection with the diagram in FIG. 74 the material in area W1 can bereduced substantially.

Reference is now made to FIG. 75 for a further embodiment of the presentinvention that is similar to the embodiment in FIGS. 73-74, but uses asolid pad rather than a laminated pad. In FIG. 75 the weldment is meantprimarily only for engagement with surfaces that are best suited for usewith a resilient pad construction, such as on concrete or asphaltsurfaces. The stabilizer pad construction includes a pair of laterallydisposed side flanges or plates 1520 that is supported, by means ofrotating pin 1524, from the distal end of the stabilizer arm 1522. Thelateral flanges, plates or plate members 1520 include at their loweredge receiving slots 1526. The slots 1526 receive the ends 1528 of thesupport rods 1529 of the resilient pad pack 1560. The pad pack 1560 is asolid rubber construction and is also provided with a pair of throughholes 1533 that receive respective retaining pins 1534. The retainingpins 1534 are also received by the holes 1535 in each of the lateralside plates 1520. In FIG. 75 the pad is also formed with an offset likethat shown in FIG. 73 and with a deeper pad segment on one side forenhanced wear.

Reference is now made to a further embodiment of the present inventionillustrated in FIGS. 76-77. This embodiment of the invention is similarto that described in, for example, FIG. 75. In FIGS. 76 and 77 theweldment is meant primarily only for engagement with surfaces that arebest suited for use with a resilient pad construction, such as onconcrete or asphalt surfaces. This pad may also be referred to as a“street pad”. The stabilizer pad construction includes a pair oflaterally disposed side flanges or plates 1620 that is supported, bymeans of rotating pin 1624, from the distal end of the stabilizer arm1622. The lateral flanges, plates or plate members 1620 aresubstantially the same as described in FIG. 73, including at their loweredge receiving slots 1626, which for this particular embodiment areoptional. The solid rubber pad 1630 also is provided with a pair ofthrough holes that receive respective retaining pins or bolts 1634, andas depicted in FIGS. 76 and 77. The retaining pins 1634 are alsoreceived by holes in each of the lateral side plates 1620. In FIGS. 76and 77 the retaining pins are in the form of elongated bolts, each withan end securing nut, as illustrated. In other embodiments other types ofsecuring members may be used such as rods with end slots for receivinghorseshoe clips or other retainers. Also, in this embodiment a solid padis shown but a laminated pad can also be employed.

The laminate rubber pack 1630 is meant to engage between the lateralside plates 1620 in the same manner as described in connection with, forexample, FIG. 58. In the embodiment of FIG. 76, to provide additionalsupport between the side plates there is provided a cross-plate 1640extending between the lateral side plates 1620. It is noted that theopposite ends of the cross-plate 1640 are welded to the side plates, andpreferably no gap is provided between the cross-plate 1640 and the padpack 1630, as depicted in FIG. 77.

In FIG. 76 it is noted that there are no support rods used. Instead, thepad pack is supported primarily by being backed against the supportplate 1640. The cross-sectional view of FIG. 77 shows the contactbetween the support plate 1640 and the upper surface of the pad 1630.Also, the plates 1620 need not be provided with slots 1626, but areprovided with passages for receiving the securing pins or bolts 1634.The securing pins 1634 are meant for just holding the pad in place, butare not meant as the primary support or force transfer for the resilientpad. In still another embodiment, similar to that shown in FIG. 20, onlybolts, or the like are used, either without the cross plate or, if used,spaced from the cross plate.

Reference is now made to a further embodiment of the present inventionillustrated in FIG. 78. This embodiment of the invention is similar tothat described in, for example, FIG. 76. In FIG. 78 the weldment ismeant primarily only for engagement with surfaces that are best suitedfor use with a resilient pad construction, such as on concrete orasphalt surfaces. The stabilizer pad construction includes a pair oflaterally disposed side flanges or plates 1720 that is supported, bymeans of rotating pin 1724, from the distal end of the stabilizer arm1722. The lateral flanges, plates or plate members 1720 aresubstantially the same as described in FIG. 73, including at their loweredge receiving slots 1726. The solid rubber pad 1730 also is providedwith a pair of through holes 1731 that receive respective retaining pins1734, and as depicted in FIG. 78. The retaining pins 1734 are alsoreceived by holes 1733 in each of the lateral side plates 1720. In FIG.78 the retaining pins are in the form of elongated bolts, each with anend securing nut, as illustrated. In other embodiments other types ofsecuring members may be used such as rods with end slots for receivinghorseshoe clips. Also, the weldment itself may be used as a dirt/gravelengaging pad when the resilient pad is removed.

The laminate rubber pack 1730 is meant to engage between the lateralside plates 1720 in the same manner as described in connection with, forexample, FIG. 58. In the embodiment of FIG. 78, to provide additionalsupport between the side plates there is provided a cross-plate 1740extending between the lateral side plates 1720. The opposite ends of thecross-plate 1740 may be welded to the side plates, and preferably asmall gap is provided between the cross-plate 1740 and the pad pack1730.

In the embodiment of FIG. 78 the primary support for the solid resilientpad 1730 is by means of the plurality of support rods 1729. These rods1729 are received in passages 1760 of the resilient pad 1730. The rodsmay be force-fit into the passages or may be freely slideable in thepassages and thus rely upon the retaining rings or horseshoe clips 1762for securing them in place. The rings or clips 1762 are received in endslots in each of the support rods 1729. The pad itself may be firstinserted between the plates 1720. Next, the rods 1729 are slid throughthe pad passages 1760 and into the slots 1726. The clips or rings 1762hold the rods in place and are disposed on the outside of the plates1720. The pins or bolts 1734 hold the pad 1730 within the weldment.

FIG. 78 also discloses a two part solid resilient pad 1730 including padsections 1730A and 1730B. These two sections may be constructed withdifferent hardness of rubber for different applications. Each of thesections has separate passages 1760 and holes 1731 so that the rods 1729and pins 1734 can be engaged in either position of the resilient pad.

Reference is now made to a further embodiment of the present inventionillustrated in FIGS. 79 and 80. The stabilizer pad construction includesa pair of laterally disposed side flanges or plates 1820 that issupported, by means of rotating pin 1824, from the distal end of thestabilizer arm 1822. The lateral flanges, plates or plate members 1820are substantially the same as described in FIG. 73, including at theirlower edge receiving slots 1826. A cross plate 1840 interconnects theplates 1820.

In the embodiment of FIGS. 79 and 80 a laminated shoe 1850 is attachedto the weldment including the side plates 1820 by means of an adaptorplate 1860. In this embodiment a laminated shoe is disclosed, however, asolid rubber shoe may also be used. The shoe 1850 includes the resilientpad 1852 that is comprised of a series of laminate layers 1854. Theselaminated layers 1854 may be held together by being supported within aU-shaped holder 1856. One or more securing pins or rods 1858 may be usedto assist in holding the shoe together. The pins 1858 may be welded tothe side walls of the holder 1856. FIG. 80 also shows four screw posts1859 that are used to attach the laminated shoe 1850 to the adaptorplate 1860. These posts are held to the adaptor plate 1860 by means ofthe nuts 1855.

The adaptor plate 1860 enables the simple laminated shoe to be attachedto the weldment, and is thus disposed therebetween. The adaptor plate1860 comprises a flat plate 1862 that is of approximately the same sizeas the holder 1856. The plate 1862 has holes, as disclose in FIG. 80 forreceiving the posts 1859 with the nuts 1855 positioned on top of theplate 1862. The adaptor plate 1860 has three solid rods 1864 welded tothe top of the plate in spaced arrangement as depicted in FIG. 80. Thespacing between these rods 1864 corresponds to the spacing between someof the slots 1826 in the plate members 1820. See also FIG. 79 where therods 1864 are shown fitting within the slots 1826. The adaptor plate1860 also has a pair of metal tubes 1866 that are welded to the topsurface of the plate 1862. These tubes are spaced at positionscorresponding to holes in the plate members 1820, and are for receivinga pair of securing pins or bolts 1868 that are used to hold the adaptorplate and shoe to the weldment, as in the manner shown in, for example,FIG. 73. In FIGS. 79 and 80 the retaining pins are in the form ofelongated bolts, each with an end securing nut, as illustrated. In otherembodiments other types of securing members may be used such as rodswith end slots for receiving horseshoe clips. Also, in this embodiment alaminated pad is shown but a molded rubber pad can also be employed.

FIG. 81 shows another version of the invention in which a moldedresilient pad is shown, and in which the shoe and adaptor plate areessentially combined into a single piece structure. In FIG. 81 the samereference characters are used to identify components like those shown inFIG. 80. Thus there is shown an adaptor plate 1860 including the flatplate 1862, the rods 1864 and the metal tubes 1866. In FIG. 81, ratherthan having a separate shoe, the resilient pad 1870 itself is secured tothe bottom surface of the flat plate 1862. The pad 1870 may be securedby an adhesive, or may be formed integrally with the plate 1862. Forexample, the plate 1862 could be a very hard rubber, integral with thesofter rubber of the pad 1870. In that case the rods 1864 and tubes 1866may be secured by an adhesive to the plate 1862.

In the embodiment of FIG. 79 the pad is not reversible, but a new shoecan be easily substituted for the shoe 1850. FIG. 82 shows an embodimentin which back-to-back shoes are used so as to make the entire padassembly reversible. FIG. 82 shows separate laminated shoes 1920 and1930. Each of these shoes may be identical to the shoe 1850 illustratedin FIG. 80 including separate laminated pads and holders. Alternatively,the resilient material of each pad may be a molded single-piece rubbermaterial. Between these shoes there is arranged a rod and tubearrangement positioned as in FIG. 80. This includes the rods 1922 andmetal tubes 1924. The pad construction of FIG. 82 is adapted to bereceived in a weldment of the type illustrated in FIG. 79 and providedwith sufficient room under the cross plate 1840 so as to accommodate onefull shoe height. In a manner as previously described securing pins orbolts pass through the metal tubes and holes in the weldment to securethe pad construction in place. The rods 1922 and tubes 1924 may bewelded between the bases of the separate pad holders so as to from aunitary pad assembly.

FIG. 83 is still another embodiment of the invention similar to the onedescribed in FIG. 81 but employing a laminated construction for theresilient pad material, and illustrating a pad that is not reversiblebut that is readily interchangeable with the weldment. The constructionof FIG. 83 comprises a resilient pad laminate 2020 that includes aplurality of laminate layers 2022 compressed together and held withinthe pad holder 2024. The laminate 2020 and holder 2024 together supportthe means by which the assembly is supported from a weldment and in asimilar manner to how the assembly of FIG. 81 is supported in aweldment.

A plurality of support rods 2026 is provided and each extends at eachend 2028 from opposite sides of the holder 2024. These support rods 2026pass through the laminate 2020 and through opposite walls 2030 of theholder 2024 with the ends 2028 extending slightly beyond the walls. Theends 2028 are meant for support in slots of the weldment as in, forexample, FIG. 79. The rods 2026 may be supported in the laminate andholder by being force fit therewith. Portions of the rods 2026 may bewelded to the side walls 2030 of the holder 2024. For receiving securingpins or bolts, as in the manner illustrated in FIG. 73, the pad isprovided with passages or tubes at 2034. Each passage or tube receivesone of the securing pins or bolts for enabling attachment of theassembly to the weldment. If tubes are used they may be welded orattached in a proper manner to the walls of the holder.

In another embodiment of the invention relating to FIG. 83, a pair ofpad assemblies may be interconnected back to back in a similar manner tothat described in FIG. 82. In that case a base 2038 of each assembly issecured together, thus forming a reversible pad construction. In such anembodiment the rods 2028 may be removable so as to engage with either ofthe assemblies. When one assembly becomes worn, then the pad is reversedso that the other assembly is in a ground engaging position. The rodsare removed to enable this reversal and are then reassembled. In theseembodiments of FIG. 83 one can also use side plates to prevent thesupport rods from coming loose, as in, for example, FIG. 54.

In still another embodiment of the invention relating to FIG. 83, onecan eliminate the extension of the support rods and rely upon thesecuring pins or bolts for the exclusive mounting and support of the padassembly from the weldment. In that case the securing pins or bolts arelarger in diameter and the side flanges or plates of the weldment mayalso be made thicker and stronger, so as to provide the correct forcetransfer between the pad and the weldment.

Reference is now made to a further embodiment of the present inventionillustrated in FIGS. 84 and 85. This embodiment of the invention hassome similarity to earlier embodiments that have been described. InFIGS. 84 and 85 the weldment is meant primarily only for engagement withsurfaces that are best suited for use with a resilient pad construction,such as on concrete or asphalt surfaces. The stabilizer pad constructionincludes a pair of laterally disposed side flanges or plates 2120 thatis supported, by means of rotating pin 2124, from the distal end of thestabilizer arm 2122. The lateral flanges, plates or plate members 2120are substantially the same as described in, for example, FIG. 73,including at their lower edge receiving slots 2126. The resilient pad2130 which, in this embodiment is a laminated pad, also is provided withthrough holes that receive respective securing rods 2150 that extendthrough the pad and, at their ends attach to the side plates 2140.Securing pins 2134 are also received by holes in each of the lateralside plates 2140, and through holes in the weldment. FIG. 84 shows thesecuring pins or bolts in place through the pad and in the weldment.FIG. 85 shows the holes 2135 in the side plates 2140 for receiving therespective securing pins or bolts 2134.

In FIG. 84 the retaining pins are in the form of elongated bolts, eachwith an end securing nut, as illustrated. In other embodiments othertypes of securing members may be used such as rods with end slots forreceiving horseshoe clips, retaining rings or the like. Also, in thisembodiment a laminated pad is shown but a molded single piece pad canalso be employed.

The laminate rubber pack 2130 is meant to engage between the lateralside plates 2120 in the same manner as previously described. In theembodiment of FIG. 84, to provide additional support between the sideplates 2140 there is provided a series of cross posts 2139 that eachextend between the lateral side plates 2140. It is noted that theopposite ends of the cross posts 2139 may be welded to the side plates2140. It is the posts 2139 that are engaged in the lower slots of theweldment plates 2120.

Reference is now made to FIGS. 86-88 for another embodiment of thepresent invention employing a readily reversible pad pack that can beengaged with the weldment in either of alternate positions. The reversalof the pad enables enhanced life of the overall pad construction becauseafter one surface has been worn down the pad can be reversed and theopposite surface can then be used as the ground engaging surface.

In the embodiment of FIGS. 86-88, the weldment is comprised of a pair oflaterally disposed plate members or flanges 2286 that are supported fromthe stabilizer arm 2287. A pin 2288 pivotally supports the side plates2286 from the stabilizer arm 2287. The resilient pad 2280 in thisembodiment is constructed as a molded pad pack, and supportable byappropriate means such as the securing members 2282 that are adapted tobe received in tapered slots 2283 at the lower edge of the metalweldment. The pad 2280 may be substantially the same as previouslyillustrated in FIG. 73. In the embodiment illustrated in FIG. 86 thereare six such members that are employed, although fewer or greaternumbers may be employed. The molded pad 2280 also has a centrallydisposed through-hole for receiving the retaining bolt 2284.

The pad construction shown in FIG. 86 has a grouser side 2220 that isillustrated as at about a right angle to the resilient surface definedby the engaging surface of the resilient pad. However, the grousersurface may also be disposed at other locations or orientations relativeto the resilient surface, as long as the pad assembly is reversiblebetween these different types of ground engaging surfaces.

Now, in FIG. 86 the grouser surface is flat with a series of grooves2242 each having a width “D” and a distance between grooves of “L”. FIG.86 also indicates the pitch “P” of these grooves. It has been found thatit is preferred to have a grouser arrangement in which the grooves arespaced from each other. This provides better gripping of the grouserside with the ground when in ground engagement. In one embodiment thewidth “D” is at least one half of the pitch “P”.

In FIG. 86 the grooves are curved or arcuate. In the alternateembodiment 2222 of FIG. 87 the grooves 2223 are also curved but thegrouser surface itself is arcuate along a predetermined radius. In thealternate embodiment 2224 of FIG. 88 the ground engaging surface is flatbut the grooves 2225 are sawtooth in shape.

In the various embodiments described herein it is to be noted that anumber of different ways have been described for holding the pad supportmembers in place. All of these described ways, as well as otheralternative ways, are characterized by some means that prevents thesupport member or members from moving laterally or longitudinally. Thismay be accomplished by the structures as described in FIGS. 58-72 or byother equivalent structures.

Having thus described several aspects of at least one embodiment of thisinvention, it is to be appreciated that various alterations,modifications, and improvements will readily occur to those skilled inthe art. Such alterations, modifications, and improvements are intendedto be part of this disclosure, and are intended to be within the scopeof the invention. Accordingly, the foregoing description and drawingsare by way of example only.

1. A resilient pad structure mounted from a support weldment comprising:a unitary resilient pad having opposite ground engaging surfaces, one ofwhich is adapted to be in a downwardly facing orientation for groundengagement; a plurality of support posts extending from said resilientpad at spaced intervals and each engaged in a direction orthogonal tothe ground engaging surface for mating with an accommodating openreceiving slot disposed along a bottom edge of said weldment; and atleast one securing member that is connectable between said resilient padand said weldment for holding said resilient pad to said weldment.
 2. Astabilizer pad structure as set forth in claim 1 wherein said supportposts extend from opposite sides of said resilient pad.
 3. A stabilizerpad structure as set forth in claim 1 wherein said support posts arespaced along opposite support sides of said resilient pad and along alinear locus.
 4. A stabilizer pad structure as set forth in claim 1wherein said resilient pad has a plurality of passages therethrough,each for receiving an elongated support member, the opposite free endsof which form said support posts.
 5. A stabilizer pad structure as setforth in claim 1 including an adaptor plate disposed between theresilient pad and weldment.
 6. A stabilizer pad structure as set forthin claim 1 wherein said resilient pad is formed of pad sections ofdifferent hardness.
 7. A stabilizer pad structure as set forth in claim1 wherein said weldment has grouser points.
 8. A resilient pad structureas set forth in claim 1 wherein said securing member comprises anelongated securing pin that extends through said resilient pad betweenspaced plate members of the weldment.
 9. A resilient pad structure asset forth in claim 1 wherein each slot is non-circular.
 10. A resilientpad structure as set forth in claim 1 wherein each slot has an open sidewhich receives the post by sliding laterally into the open slot.
 11. Aresilient pad structure as set forth in claim 1 wherein said resilientpad is formed of a laminate of a plurality of resilient pad layers, andsaid support posts are formed by plural rods that are force-fit withinpassages of said resilient pad layers to maintain said layers together.12. A resilient stabilizer pad comprising: a resilient pad member havingopposite ground engaging surfaces, one of which is adapted to be in adownwardly facing orientation for ground engagement, and having oppositesupport surfaces; and a plurality of mounting lugs that are permanentlyaffixed with said pad member including one lug set extending from onesupport surface side of said resilient pad member for releasableengagement with a corresponding open receiving slot set disposed along abottom edge of one support plate of a weldment, and another lug setextending from an opposite support surface side of said resilient padmember for releasable engagement with a corresponding open receivingslot set disposed along a bottom edge of another support plate of aweldment.
 13. A resilient stabilizer pad as set forth in claim 12wherein said resilient pad has a plurality of passages therethrough,each for receiving an elongated support member, the opposite free endsof which form said support lugs, and wherein the elongated supportmembers are fixed in said passages in both a mounted and dismountedposition of said resilient pad.
 14. A resilient stabilizer pad as setforth in claim 12 wherein said support lugs are spaced along oppositesupport sides of said resilient pad and along a linear locus.
 15. Aresilient stabilizer pad as set forth in claim 12 including a securingmember that comprises an elongated securing pin that extends throughsaid resilient pad between the support plates of the weldment.
 16. Aresilient stabilizer pad as set forth in claim 12 wherein each slot hasan open side which receives the lug by sliding laterally into the openslot.
 17. A resilient pad structure as set forth in claim 12 whereinsaid resilient pad is formed of a laminate of a plurality of resilientpad layers, and said mounting lugs are formed by plural rods that areforce-fit within passages of said resilient pad layers to maintain saidlayers together.
 18. A resilient pad structure for mounting from asupport weldment at a series of slots in respective plate members of theweldment, said resilient pad structure comprising: a resilient padhaving opposite ground engagable surfaces, one at a time of which isadapted to be in a downwardly facing orientation for ground engagementwhile the other surface is out of ground engagement; said resilient padalso having opposite support surfaces that are disposed generallytransverse to said ground engagable surfaces; said resilient pad furtherhaving respective mounted and dismounted positions relative to saidweldment; a plurality of support rods extending through said resilientpad and disposed in a pattern corresponding to and for engagement atrespective ends thereof with said series of slots of said weidment; saidsupport rod ends extending beyond respective opposite support surfacesof said resilient pad for engagement with said slots; said support rodsbeing fixed with said resilient pad in both the mounted and dismountedposition of said resilient pad; each said plate member slot comprisingan open receiving slot extending in the plane of said plate member at anedge thereof; each said support rod end for mating engagement with anopen receiving slot.
 19. A resilient pad structure as set forth in claim18 including at least one securing member that is connectable betweensaid resilient pad and said weldment for holding said resilient pad tosaid weldment.
 20. A resilient pad structure as set forth in claim 19wherein said securing member comprises at least one retaining pin thatextends through the resilient pad and a hole in each plate of theweldment.
 21. A resilient pad structure as set forth in claim 18 whereinsaid resilient pad comprises a laminated pad including a plurality ofresilient pad layers inter-engaged by at least said support rods to forma unitary resilient pad.
 22. A resilient pad structure as set forth inclaim 18 wherein said resilient pad comprises a molded pad having thesupport rods pass therethrough for support of said resilient pad.
 23. Aresilient pad structure as set forth in claim 18 wherein said supportrods are force fit in accommodating holes in said resilient pad.
 24. Aresilient pad structure as set forth in claim 18 including a sleeve oneach end of each said support rod.
 25. A resilient pad structure as setforth in claim 18 wherein the support rod has a roughened surface toenhance engagement with the resilient pad.
 26. A resilient pad structureas set forth in claim 18 including at least one side plate for holdingthe support rod in place.
 27. A resilient stabilizer pad for mounting toa weldment comprising: a resilient pad having opposite ground engagablesurfaces, one at a time of which is adapted to be in a downwardly facingorientation for ground engagement while the other surface is out ofground engagement; said resilient pad also having opposite supportsurfaces that are disposed generally transverse to said ground engagablesurfaces; said resilient pad further having respective mounted anddismounted positions relative to said weldment; and a plurality ofmounting posts that are permanently affixed with said resilient padincluding at least one post extending from one support surface side ofsaid resilient pad for releasable engagement with a corresponding slotof one support plate of the weldment, and at least another postextending from an opposite suppport surface side of said resilient padfor releasable engagement with a corresponding slot of another supportplate of the weldment; said mounting posts being maintained fixed withsaid resilient pad in both the mounted and dismounted position of saidresilient pad; each said support plate slot comprising an open receivingslot extending in the plane of said support plate at an edge thereof;each said mounting post for mating engagement with an open receivingslot.
 28. A resilient stabilizer pad as set forth in claim 27 whereinsaid resilient pad has at least one passage therethrough for receivingan elongated support member, the opposite free ends of which form saidmounting posts.
 29. A resilient pad structure as set forth in claim 27wherein said resilient pad is formed of a laminate of a plurality ofresilient pad layers, and said mounting posts are formed by plural rodsthat are force-fit within passages of said resilient pad layers tomaintain said layers together.